FIELD OF INVENTION
This invention relates to a power backup system for a treadmill to provide power backup during failure. More particularly, the present invention provides a power backup system with speed control for treadmill.
PRIOR ART
Recently, treadmills for people to walk or run on have become increasingly popular. The principal advantage of a treadmill is that it is handy for indoor physical exercise. However, conventional treadmills are associated with several disadvantages.
Generally, when the emergency condition such as power failure, short circuit and overload occurs during its operation, there is a possibility that the conveyor might carry out a quick stop and the runner/user may fall.
The design of a conventional treadmill is based on the concept that the load from the user is assumed to be linear so that the treadmill belt drive motor drives the treadmill belt at a constant power. However, in actual practice, the load from the user is nonlinear. Every step from the user adds a load to the motor instantaneously. Because the treadmill belt drive motor of a conventional treadmill provides a constant output, the output of the treadmill belt drive motor becomes insufficient during the instant in which the load is changed, causing a sudden speed reduction or cogging of the treadmill and as a result, the user may feel unstable. Increasing the power of the treadmill belt drive motor can eliminate the sudden speed reduction or cogging problem. However, when the load from the user is reduced (for example, the user's step becomes light), the power of the treadmill belt drive motor becomes excessively high, and the user may slip and fall. In other words, a conventional treadmill belt drive motor has the drawback of difficult speed change control. Further, increasing the output of the conventional treadmill belt drive motor of a treadmill will relatively increase the power consumption and electricity expense. Therefore, this is not an

economic way. Further, the noise produced during operation of the treadmill belt drive motor of a conventional treadmill may bother the user.
Also in the conventional systems, a computer is mounted between the two arms and includes multiple keys for the user to control the treadmill. The computer is away from the user because the computer is mounted on the arms and the user runs on the platform. Consequently, the user needs to bend his back down to operate the computer during exercising. However, the user is in a harmony posture during exercising. The user is in a movement when exercising and pressing the keys in the computer will break the balance of harmony posture such that the user easily falls down when operating the computer so as to adjust the speed of the treadmill by using keys in the computer.
Now, reference may be made to the following:
Publication no JP2005045973 relates to an inverter capable of driving an induction motor without stopping the device at the time of instantaneous power failure and without the need for providing a DC voltage detector. This does not discloses the user settable control of the system is not given.
Publication no JP11164589 is related to an inverter device which provides prevention of free-running of a motor. It decelerates and stops the motor within a fixed time. This invention does not talk about user settable control of the system is not given.
US patent no 7,166,064 is directed to the systems and methods for providing two-way communication between an exercise device and a computer device. A computer device and an exercise device employ different protocol formats and communicate through a translator device, which includes a microcontroller specifically designed to translate data or signals deliverable by different communication protocols. This patent deals with the system and method of providing two way communications.

Publication no IN 161551 discloses a variable speed drives motor system with an inverter control. This doe s not traces the fault conditions and user cannot set the parameters in that.
Publication no WO2009/051305 provides a treadmill, including: a body having a belt for supporting an exerciser; a driving motor for driving the belt; a motor driving portion for driving the driving motor. The treadmill quickly follows acceleration or deceleration of an exerciser, realizes a feeling like what an exerciser has while exercising on the ground to thereby improve an exerciser's exercising feeling, accepts various exercising patterns of an exerciser, and pre-processes measured values of an exerciser's position to resolve a problem in that a speed of a belt can not be controlled due to measurement errors contained in measured values. This patent is not a backups system which can provide power during power failure.
Publication no WO2009051354 relates to a signal processing apparatus for a treadmill, which includes: a first input connector that is physically separated from a first treadmill that includes a first belt for supporting a first exerciser and is electrically connected to the first treadmill to receive a first exerciser speed corresponding to a driving speed of the first belt; and an extended control portion that is electrically connected to the first input connector to determine first symbol display coordinates using the first exerciser speed and output a symbol corresponding to the first exerciser at the first symbol display coordinates through a display device. This patent is not a backups system which can provide power during power failure.
Publication no CN200970435 discloses a running machine with a charger, which is composed of a base, a rotational axis, a running belt, a support and a handle, as well as a fly wheel, a friction wheel, a generator, a charger, a bridge rectifier and a material stand.
Again, reference may be made to the product by "Taiwan OEM manufacturer". The product is Rm5t / 51 frequency inverter for treadmills.

Reference may be made to the product by "AC Tech Control System". The article proposes a treadmill inverter with SPWM control mode, constant torque and adjustable V/F. It is provided with built-in PID control, PLC function and RS-485 communication interface.
Referring to a product by "K & K International" comprising an inverter for a treadmill wherein Treadmill hardware/ software are re-engineered according to customer's requirement. The system has embedded dynamic brake control and provides PC tools for parameter setting.
Further, reference may be made to the product by "Hyundai Heavy Industries Co. Ltd" disclosing a low voltage inverter and a single phase vector inverter. The inverter provides a stable operation even under the instantaneous impact load and overload realized through the addition of over-current level adjusting function. It maintains constant speed even at the time of sudden load change by rapid speed restoration characteristics. The inverter is applicable to the transfer machine, treadmill and industrial washing machine due to its function of momentary current suppression.
None of the above- described arrangements address the speed control system for treadmill conveyor without decelerating or stopping it abruptly in emergency condition and provide emergency power backup. In such treadmills, there is a possibility that the conveyor might carry out a quick stop making the runner fall. Thus, the above said arrangements talk about the controller of induction motor, which are not the power backup system for supplying power during power failure. Hence, there exists a need for a power backup system which decelerates the treadmill slowly and provides power to avoid the accident.
Therefore, in view of the above prior arts, the present invention provides a power backup which gives speed control command to the controller that decelerates the speed of conveyor in multiple steps and is preferably applied, for example, to a treadmill.

OBJECTS OF THE INVENTION
The primary object of the present invention is to provide a power backup system for a treadmill.
Another object is to provide a high capacity power source for a backup system which is quite cost effective.
Yet another object of the present invention is to provide a power backup system which gives command to the controller of the treadmill so as to decelerate the speed of the motor/ conveyor as per the predefined program during emergency conditions such as power failure, short circuit or overload conditions.
Still another object of the present invention is to provide a power backup system which gives command to decelerate the speed of conveyor in multiple steps.
Another object of the present invention is to provide a power backup system which avoids the accident to prevent the runner from falling.
Yet another object of the present invention is to provide a system which gives the information to the controller of the treadmill for the backup time.
Still another object of the present invention is to provide a power backup system which can be monitored and controlled from a remote location.
Another object of the present invention is to provide a power backup system which can log all the history of the treadmill operation.
Yet another object of the present invention is to provide a system which gives an alarm for the user as per the user settable instructions/ time.

Yet another object of the present invention is to provide a system which provides prior information of low charge state of energy storage device to the user as well as treadmill.
SUMMARY OF THE INVENTION:
The present invention provides a power backup system which gives speed control command for use in devices such as but not limited to treadmills. The power backup system gives command in such a way that, speed control system of the treadmill decelerates the speed of conveyor in multiple steps or predefined program by outputting a rotational speed control command to the motor to avoid any accident, when detecting emergency condition such as power failure, short circuit and overload.
In an embodiment of the present invention, the system during a low charge state of energy storage device; provides prior information to the user and gives command to the treadmill to reduce the speed slowly and stop.
In another embodiment of the present invention, a controller controls the control panel which displays the message, the user controls, the keypad, an optional remote display and a remote keypad.
In yet another embodiment of the present invention, a detector detects the emergency conditions such as power failure, overload and short circuit and causes the system outputting a command to the control system of the treadmill for decelerating the speed of the conveyor.
In still another embodiment of the present invention, the treadmill communicates with the central system at any location through a communication media.

In another embodiment of the present invention, the power backup system has connectivity through a communication media that provides connectivity of the power backup system to the web with or without a computer.
In still another embodiment of the present invention, the backup system checks for power failure, low battery, overload, short circuit etc.
STATEMENT OF INVENTION
According to this invention, there is provided a power back system for a treadmill comprises controller which controls the inverter to store the charge in the battery and supplies power to the treadmill during failure and, a signal conditioning unit to control the speed of the motor by giving command to the speed controller of the treadmill wherein the controller also controls a communication unit which is connected to power supply.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein:
Figure 1: shows a block diagram of a power backup system for treadmill in accordance with the invention.
Figure 2: shows a flow diagram according to the present invention.

DETAIL DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS;
The present invention discloses a power backup system which gives speed control command for use in devices such as but not limited to treadmills. The invention comprises controller 1 which controls the inverter 2 to store the charge in the battery 3 and supplies power to the treadmill 4 during failure and, the signal conditioning unit 5 to control the speed of the motor 6 by giving command to the speed controller 7 of the treadmill. The controller 1 also controls the communication unit 8 which is connected to the power supply 9. The controller 1 is provided in connection with the input supply 10.
The power backup system gives command in such a way that, the speed control system 7 of the treadmill 4 decelerates the speed of conveyor in multiple steps or through predefined user settings/ program by outputting a rotational speed control command to the motor when detecting emergency condition such as power failure, short circuit and overload. The main controller 1 monitors and controls the complete operation of the system. The main controller 1 measures the input mains supply 10, the speed and load current of the treadmill motor 6 and adjusts the speed of the treadmill 4 according to user settable settings or default settings.
The batteries 3 are used for providing the backup to the system in case mains fail. The main controller 1 communicates with the speed controller of the treadmill 4 to set the speed of the motor according to the user setting. The communication section 8 is used to control and monitor the complete system. It can be either wired or wireless communication.
During the low charge state of energy storage device 3, the system informs the user in advance and gives command to the treadmill 4 to reduce the speed slowly to stop. According to one preferred embodiment of the present invention the main controller 1 detects the emergency conditions such as power failure, overload and short circuit and causes the inverter to output a command to the control system of the treadmill for

decelerating the speed of the conveyor. The power backup system logs all the history of the treadmill which can be retrieved and viewed later. Also it gives an alarm for the user as per the user settable instructions. A controller controls the control panel which displays the message, the user controls, the keypad, an optional remote display and a remote keypad. The control system also controls a user detector or sense system.
Reference may be made to Figure 2 showing flow chart according to the present invention. The system initializes the controller and reads the last user setting/ default settings for the operation of backup system and performs self test to check the hardware functioning. If it is not OK the message about failed parameter will be displayed and wait for correction. After the completion of the test, it monitors the input voltage and the speed of the treadmill, measures the load current to the motor. Thereafter, condition of power failure, low battery, overload, short circuit etc is checked. During power failure, it first provides the backup supply to the treadmill and the controller 1 gives the command to the treadmill controller to slow down the speed of the treadmill in predefined/ instructed time and then the treadmill is stopped. During overload it also gives backup supply and stops the treadmill by giving command to controller and slows it down gradually. The message of an error will be displayed and an alarm is sent to the user. If any short circuit occurs, the system is shut down and critical alarm is raised to the user and buzzer is blown
If there is no error, it checks for the communication command received, processes the command and gives the answer to the command or saves the received user settings. Now user can shut down the system.
The power backup system has connectivity through a communication media. It provides connectivity of the power backup system to the web with or without a computer. Using this, the user can monitor & control the product from a remote location using such as but not limited to the handheld device. Also, the treadmill can communicate with the central system at any location. Thus, any number of treadmills from any location can communicate with each other and monitored & controlled

through the central system. The present invention uses wires as well as wireless protocols for communication.
Numerous modifications and adaptations of the system of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the true spirit and scope of this invention.

WE CLAIM
1. A power back system for a treadmill comprises controller which controls the inverter to store the charge in the battery and supplies power to the treadmill during failure and, a signal conditioning unit to control the speed of the motor by giving command to the speed controller of the treadmill wherein the controller also controls a communication unit which is connected to power supply.
2. A power backup system as claimed in claim 1, comprising of a detector which detects the emergency conditions causing the inverter to output a command to the control system of the treadmill for decelerating the speed of the conveyor/ treadmill.
3. A power backup system as claimed in claim 1 or 2, wherein during power failure and during overload the supply is provided as follows:

• the backup supply to the treadmill checks the battery condition
• the command to the treadmill controller to slow down the speed of the treadmill in predefined/ instructed time based on battery condition
• display error and raise alarm
• stopping of the treadmill.

4. A power backup system as claimed any of the preceding claims, wherein the system during the low charge state of energy storage device, provides prior information to the user and gives command to the treadmill to reduce the speed slowly before stopping.
5. A power backup system as claimed in any of the preceding claims, wherein during short circuit, the system is shut down, critical alarm is raised to the user and buzzer is blown.
6. A power backup system as claimed in any of the preceding claims, wherein the system logs all the history of the treadmill and gives an alarm for the user as per user settable instructions.
7. A power backup system as claimed in any of the preceding claims, wherein a communication media provides connectivity of the power backup system to the web with or without a computer wherein the system is monitored and controlled from a remote location using a hand held device.
8. A power backup system as claimed in any of the preceding claims, wherein the communication media comprises wired and/ or wireless protocols wherein the backup system checks for power failure, low battery, overload, short circuit etc.
9. A power back system for a treadmill substantially as herein described with reference to accompanying drawings.