US 6,548,984 B2Granted

Power output device

AssigneeToyoda Jidosha Kabushiki Kaisha

InventorsSumikazu Shamoto, Shoichi Sasaki, Eiji Sato, Masayuki Komatsu, Kazunari Moriya, Hiroki Ohtani, Yukio Inaguma

Life of this patent

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Abstract

When the absolute values of the negative voltage V− and the positive voltage V+ of a rectangular wave to be applied to the three phase coils of the motor driven using a rectangular-waved voltage are different, time T1 and time T2 for the rectangular wave are adjusted such that the area A representing the absolute value of a time integration value of the negative voltage V− and the area B representing the absolute value of a time integration value of the positive voltage V+ becomes equal to each other. With this adjustment, the average voltage of the rectangular wave becomes of value 0, so that a DC component current is prevented from flowing into the three phase coils of the motor.

Claims20

Dependent claims

A power output device, comprising:

a motor designed to be driven to rotate using multiple phase AC power;
an inverter circuit supplying multiple phase AC power to the motor while switching a plurality of switching elements;
a first power source connected to a positive bus bar and a negative bus bar of the inverter circuit;
a second power source connected to the positive bus bar or the negative bus bar of the inverter circuit and to a neutral point of the motor;
and
a controller for controlling switching of the plurality of switching elements of the inverter circuit such that a ratio between positive and negative voltages relative to a potential at the neutral point of the motor, concerning respective phases of the multiple phase AC power to be supplied to the motor, become a predetermined ratio based on a voltage of the first power source and a voltage of the second power source.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/887,016Filed 25 Jun 2001
Priority: JP 2000-19976730 Jun 2000
Published: US 2002/0000784 A13 Jan 2002
Granted: 15 Apr 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H02P 27/08
Using DC to AC converters or inverters: with pulse width modulation
H02M 7/53873
With automatic control of output voltage or current: with digital control
H02P 6/08
Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position;…:…
H02P 6/10
Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position;…:…