1. Title of Invention

Ultra low energy consuming DC motors made up of rare earth magnets with back EMF trapping mechanism.

2. Applicant

Name : EESAVYASA TECHONOLOGIES PVT. LTD
Nationality : INDIAN
Address : R&D centre, Plot No: 79, Phase - III, Balanagar, Hyderabad, R.R. District, Andhra Pradesh, Pin - 500037, INDIA.

3. Preamble to the description: Complete Specification: Summary:
In this method of invention DC motors, brushless DC motors which are producing back EMF as wastage of energy without converting into work is designed. The design includes arrangement of HAL effect sensors usually placed around rotor and commuter in a DC motor and additional single turn off wire coil is placed around primary turnings. When HAL effect sensors which are trapping back EMF to the extent possible is connected to single turn off wire coil, their poles reverses as secondary back EMF i.e. positive EMF induced into the magnet placement yielding more torque. This is a molecular level arrangement of free electrons changing their spin by inducing double spin orientation in their opposite directions. Double back EMF directional change harnesses the wastage and harvest back positive EMF to yield energy optimization. Due to extended performance in terms of output, user feel energy saving is obtained. In this invention neodymium permanent magnets doped with samarium, lanthanum, didymium metal etc are used to design brushed and brushlqss motors.

4. Description

1. The present invention relates to the driving and controlling of closed loop step motors. More particularly, it relates to the detection of the back EMF induced in the windings of a step motor by a permanent magnet in the rotor of the motor. The value of this back EMF can be used to indicate the position of the rotor of the motor.

2. The use of the windings of a step motor both to drive the motor and to provide the position determining feedback pulses is known in the prior art.

3. In each of the prior art systems, however, the feedback signals from the motor windings must be subjected to complex processing which increases the cost of the system.

4. A secondary coil will be placed around the primary coils.

5. Both the primary and secondary coils are connected to each other. This is called HAL effect.

6. This effect seizes the back EMF produced in the system.

7. But due to the secondary coil of same polarity then, back EMF and secondary coil induces double spin and again utilized for the rotor movement.

8. This reduces the wastage of the total system and the system will be optimized.

Back ground:

When current is flowing through the armature conductor of DC motor, it starts rotating inside the magnetic field of stator pole. As the armature conductors move inside the magnetic field there will be an induced EMF in the armature conductor. This EMF would be due to Faraday law of electromagnetic induction. The direction of the induced EMF will be as per Fleming right hand rule and the induced EMF will oppose the applied voltage across the armature terminals. In other words in DC motor the rotating armature will generate an EMF as it is rotating under magnetic field, in opposite of the applied voltage and this generated EMF in DC motor is called back

6. Brief description of drawing

1. Single turn secondary coil

2. Primary coil

3. North pole

4. South pole

5. Hal effect sensor

7. Claims

1. This method of invention is used to harvest unutilized or waste back EMF going into surroundings from brushed and brushless DC motors. This harvesting enhances the energy efficiency of the motor.

2. This method of invention is used to harvest unutilized or waste back EMF going into surroundings from brushed and brushless servo motors. This harvesting enhances the energy efficiency of the motor.

3. This method of invention is used to harvest unutilized or waste back EMF going into surroundings from brushed and brushless stepper motors. This harvesting enhances the energy efficiency of the motor.