FORM 2
THE PATENT ACT 1970
(39 of 1970)
&
The Patents Rules, 2003
PROVISIONAL SPECIFICATION
(Refer section 10 and Rule 13)
1. TITLE OF THE INVENTION:
'MULTIPHASE POWER MANAGEMENT UNIT'

2. APPLICANT:
a) Name
b) Nationality
c) Address

INTELUX ELECTRONICS PRIVATE LIMITED Indian
Unit No.2, Electronic Co-op. Estate, Pune - Satara Road, Pune-411 009, India.

3. PREAMBLE TO THE DESCRIPTION
The following specification describes the invention.


Field of the Invention
[001] Embodiments of the present invention generally relate to power management systems and techniques, and more particularly to a multiphase power management unit (PMU) capable of managing power requirements for superior and efficient operational performance.
Description of the Related Art
[002] Power management plays a very crucial role in managing and controlling power requirements for superior and efficient performance across multiple applications, such as telecommunication applications (i.e. towers) among others. In telecommunication, generally three phase supply is available and a dedicated power system is used to continuously power the base transmission station (BTS) site. As the demand load for 3 phase system is enhanced drastically, so the voltage range has also become wide i.e. available voltage range is from 240 VAC to 500 VAC in three phase system. Some times supply requirement comes down below the 240VAC. i.e. up to 150VAC for three phase system.
[003] Conventionally, there exist various power management solutions for controlling power requirements across multiple applications. However, such solutions are only able to function specifically either for a single phase supply or 3 phase supply conditions at a given point of time. Hence, the conventional solutions are unable to provide solutions for different types of supply conditions (such as a single phase supply, 2 phase or 3 phase supply conditions simultaneously) as a single unit. Hence it is required to have separate power management modules for the single phase or 3 phase supply conditions for managing power requirements which increase the installation and product expenditures.
[004] Further, due to poor electrical supply distribution and load shading in various parts of the country, there is always tremendous usage of Diesel Generator (DG) usage due to unavailability of sufficient power supply. Further,
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most of the times only single phase supply is available, which is insufficient for conventional power management units (PMUs), as such power management units only require phase to phase supply for proper functioning.
[005] Therefore, there is a need in the art to provide a Power Management Unit (PMU) for managing superior and efficient power requirements.
SUMMARY OF THE INVENTION
[006] A multiphase Power Management Unit is disclosed. The Power Management Unit (PMU) is an efficient system, which can manage the power requirements at the un-manned base transmission station (BTS) site and provide a single point control & monitoring facility for superior, efficient operational performance. The PMU covers wide input supply range 100- 495 V and corrects the output voltage in less than 10 ms. The PMU is designed with a unique feature of zero voltage correction technology. Further, the PMU provides complete isolation of the load from the input mains supply.
BRIEF DESCRIPTION OF THE DRAWINGS
[007] So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
[008] Figure 1 illustrates system architecture of the Power Management Module (PMU) in accordance with one or more embodiments of the invention; and
[009] Figure 2 illustrates a flow diagram of a method for managing power through the power management unit (PMU) in accordance with one or more embodiments of the invention.

DETAILED DESCRIPTION:
[0010] Figure 1 illustrates system architecture of the power management unit in accordance with one or more embodiments of the invention. A Power Management Unit (PMU) 100 is highly integrated, software driven system for controlling and monitoring of AC power supply across multiple applications, such as Cellular Base Stations, and the like.
[0011] The power management unit 100 broadly includes a Phase Selection Module 102, a Power Regulation Unit (PRU) 104, and a DG Control / Charger (not shown).
[0012] The Power Management Unit (PMU) 100 further includes an input module 108 for receiving power supply for the PMU 100. The input module 108 receives a 3-phase supply with neutral and ground connections through a miniature circuit breaker (MCCB). In an embodiment, the phase to phase (P-P) supply varies from 200 - 500 VAC and phase to neutral (P-N) varies from 100 -250 VAC.
[0013] The PMU 100 further includes a sensing module 110 for sensing various voltages levels. The sensing module 110 simply senses whether the input supply is a phase-to-phase supply or a phase-to-neutral supply and the sensing module 110 further passes this supply type information to a control and analog module 112.
[0014] The stepped down analog AC voltages received from the sensing module 110 are fed to the control and analog module 112 as an input to AC to DC section. A DC analog output of AC to DC section is fed to the control section from analog section. After getting DC analog output from AC to DC section, the control and analog module 112 generates the digital signal which is fed to the control and analog module 112. The module 112 activates a digital signal that represents either a phase neutral (P-N) logic or a phase to phase (P-P) logic as shown by arrow 1P and 3P respectively in the Figure 1.
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[0015] In an embodiment, the control and analog module 112 can be an embedded microcontroller. In an embodiment, the controller is any type of microcomputer that comprises a Central Processing Unit (CPU), various support circuits and a memory. The controller reads out application programs stored in a ROM and executes the program using the CPU. The CPU may comprise one or more commercially available microprocessors or microcontrollers that facilitate data processing and storage. Various support circuits facilitate operation of the CPU and may include clock circuits, buses, power supplies, input/output circuits and/or the like. The memory includes a Read Only Memory, Random Access Memory, disk drive storage, optical storage, removable storage, and the like.
[0016] In an embodiment, the digital signal received from the control and analog module 112 is fed to a best phase selection module 114. The best phase selection module 114 represents 2P / 3P logic with best phase selection criteria from the 3 phase supply. Through the best phase selection module 114, two digital signals are generated through a potential free contact with best phase selection criteria which in turn switch on the two concern contactors.
[0017] In alternate embodiment, a digital signal received from the control and analog module 112 is fed to a best single phase selection module 116. The best phase selection module 116 represents a phase neutral logic with best phase selection criteria. Here one digital signal is generated through a potential free contact with best phase selection criteria and in turn switch on the one concern contactor.
[0018] The output from the phase selection module 102 is either a best phase neutral (P-N) logic or a best phase to phase (P-P) logic as shown by arrow 1P and 2P on the right side of the phase selection module 102. This output is moved to the Phase Regulating Unit (PRU) 104 for regulating the phase through a sensing card module 118.
[0019] The sensing card module 118 senses the primary voltage. If it is in the range of 260 VAC - 485 VAC at power on condition (before output contactor is

ON) and operates in the range of 200VAC - 485VAC after output contactor is ON, then the sensing circuit 118 generates a signal to switch OFF the power regulation Unit 104 contactor.
[0020] In an embodiment, the sensing card module 118 can be an embedded microcontroller. In an embodiment, the controller is any type of microcomputer that comprises a Central Processing Unit (CPU), various support circuits and a memory. The controller reads out application programs stored in a ROM and executes the program using the CPU. The CPU may comprise one or more commercially available microprocessors or microcontrollers that facilitate data processing and storage. Various support circuits facilitate operation of the CPU and may include clock circuits, buses, power supplies, input/output circuits and/or the like. The memory includes a Read Only Memory, Random Access Memory, disk drive storage, optical storage, removable storage, and the like.
[0021] The sensing card module 118 further senses the primary voltage. If it is in the range of 170VAC - 250VAC at power on condition (before output contactor ON) and in the range of 100VAC - 250VAC after output contactor ON, then the sensing card module 118 generates a signal to switch ON the Power Regulation Unit 104 contactor.
[0022] In an embodiment, in case of primary voltage ranges from 265 VAC -485 VAC, the Power Regulation Unit 104 contactor switches OFF, thus making two primary windings of transformer in series logic as shown by bock 120. The block 120 illustrates series logic of primary winding for Phase to Phase logic.
[0023] In another embodiment, in case of primary voltage ranges 170 VAC -250 VAC, the Power Regulation Unit 104 contactor switches ON, thus making two primary windings of transformer in parallel logic as shown by block 122. The block 122 illustrates parallel logic of primary winding for phase to neutral logic.
[0024] In this manner a desired output is generated and supplied to a load for managing various power requirements in a quick and controlled manner. The

Power Manage Unit PMU 100 performs stabilization, AMF function and also acts as single point control & monitoring facility for mains, generator and remote alarms.
[0025] Figure 2 illustrates a flow diagram of a method for managing power through the power management unit (PMU) in accordance with one or more embodiments of the invention.
[0026] The method starts at step 202 and proceed to step 204, at which input voltage levels are sensed. At step 206, the sensing module 110 decides whether the input (l/P) supply is a phase-to-phase supply or a phase-to-neutral supply.
[0027] If the input (l/P) supply is a phase-to-phase (P-P) supply, the module 112 activates a digital signal that represents a phase to phase (P-P) logic as shown at step 210. At step 214, a best phase logic representing 2P/3P logic is selected. At step 218, two primary windings of the transformer are made in series logic, if the primary voltage ranges from 265 VAC - 485 VAC. At step 222, the output is supplied to suitable load. The method proceeds further to step 224, at which the method ends.
[0028] If the input (l/P) supply is a phase-to-neutral (P-N) supply, the module 112 activates a digital signal that represents a phase to neutral (P-N) logic as shown at step 208. At step 212, a best phase - neutral logic representing best phase is selected. At step 216, two primary windings of the transformer are made in parallel logic, if the primary voltage ranges from 170 VAC - 250 VAC. At step 220, the desired output is supplied to suitable load. The method proceeds further to step 224, at which the method ends.
[0029] The following sections describe various features and characteristics of the proposed Power Management Unit PMU 100.
[0030] The PMU 100 continuously monitors the input mains supply voltage and regulates the output supply provided to load, such as BTS, and other

equipments. The PMU 100 covers wide input supply range 100- 495 V and corrects the output voltage in 10 ms. The proposed PMU 100 is designed with a unique feature of zero voltage correction technology. Further, the PMU provides complete isolation of the load from the input mains supply.
[0031] The PMU can also control & monitor the generator performance. With the input mains supply failure; the unit automatically switches on to the diesel generator unit and transfers it to the load. The PMU has built in operation logic where by the user can set the generator ON / OFF time based on BTS room temperature and battery voltage.
[0032] Along with the power management function the PMU can also monitor
the auxiliary functions like door open, fire/smoke alarms etc. The PMU extends
the DG and mains status alarms to base transmission system (BTS) with potential contacts.
[0033] The PMU may also be integrated with NMS system via General Packet Radio Service (GPRS) modem and can communicate both way and logs events for further analysis and logged data can be retrieved from the PMU via RS-485 port.
[0034] Further the proposed Power Management Unit (PMU) offers various advantages while utilized in various applications as given below:
[0035] The proposed Power Management Unit (PMU) is utilized for
multiphase applications and can work in well for phase to neutral (P-N) and/or phase to phase (2P or 3P) supply conditions.
[0036] The Power Management Unit (PMU) does not require any manual switching from a single phase supply to multiphase supply and vise versa. This switching is completely automatic.
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[0037] Most of the time Power Management Unit (PMU) will run on mains supply only. This will simply saves the usage of diesel generator (DG) which contributes to major cost saving in diesel consumption.
[0038] The proposed Power Management Unit (PMU) is utilized for multiphase applications and operates in wide supply range i.e. from 100 VAC to 250VAC for single phase and from 200 VAC to 500 VAC for multiphase supply. Thus, the proposed Power Management Unit (PMU) works at worst supply voltage conditions.
[0039] While the foregoing is directed to embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof.
Date:31st day of July 2009. Signature:
Nitin Mittal (IN/PA-1321)
Agent of the Application