Power supply system

• US 9,783,058 B2
• Filed: 09/22/2014
• Issued: 10/10/2017
• Est. Priority Date: 09/24/2013
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation), Toyota Turbine And Systems, Inc. (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation), Toyota Turbine And Systems, Inc. (Toyota Motor Corporation)
• Inventors: Ueda, Shingo, Mizuno, Tomoyuki
• Primary Examiner(s): Leykin, Rita
• Application Number:
  US15/024,280
• Publication Number:
  US 20160207402A1
• Time in Patent Office: 1,114 Days
• Field of Search: 318139, 318149
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 1/006 to power outlets
• CPC Class Codes: B60L 15/025 using field orientation; Vector control; Direct Torque Control [DTC]
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: H02P 5/747 mechanically coupled by gearing
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A power supply system includes a first controller that, controls an MG1 inverter, a second controller that controls an MG2 inverter, and a voltage sensor that detects a voltage generated from a pair of output terminals. The first controller controls the MG1 inverter according to a target value of the voltage generated from the output terminals, irrespective of the magnitude of a deviation between the target value of the voltage generated from the output terminals, and the detected voltage. The second controller controls the MG2 inverter according to the deviation. This processing is implemented by an effective value computing unit, effective value PI control unit, and a neutral point output voltage command unit.

Claims

1. A power supply system comprising:

a first inverter;

a first motor-generator driven by the first inverter;

a second inverter;

a second motor-generator driven by the second inverter;

a pair of output terminals including a first terminal connected to a neutral point of stator coils of the first motor-generator, and a second terminal connected to a neutral point of stator coils of the second motor-generator;

a voltage detector that detects a voltage generated from the pair of output terminals;

a first controller configured to control the first inverter according to a target value of the voltage generated from the output terminals, irrespective of a magnitude of a deviation between the target value of the voltage generated from the output terminals, and the voltage detected by the voltage detector; and

a second controller configured to control the second inverter according to the deviation to reduce the deviation between the same target value according to which the first inverter is controlled and the voltage detected by the voltage detector.

2. The power supply system according to claim 1, wherein

the power supply system is installed on a vehicle;

the vehicle includes drive wheels, and an internal combustion engine;

the first motor-generator is configured to receive mechanical power of the internal combustion engine and generate electric power;

the second motor-generator is configured to drive the drive wheels; and

the first controller is configured to execute dead time compensation control of the first inverter, when the first motor-generator generates electric power while electric power is supplied from the pair of output terminals to a load.

3. The power supply system according to claim 2, wherein each of the first controller and the second controller comprises a computer having substantially the same performance.