Motor control apparatus

Patent metadata

Field	Value
Publication number	US-9263976-B2
Application number	US-201414490325-A
Country	US
Kind code	B2
Filing date	Sep 18, 2014
Priority date	Sep 18, 2013
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A motor control apparatus includes: duty calculation units that calculate a duty of a PWM signal based on a deviation between a value of a physical quantity of a motor with a command value; and a duty setting unit that performs setting of the duty based on the duty calculated by the duty calculation units. The duty setting unit maintains a present duty until new duty is input from any one of the plurality of duty calculation units, and updates the duty from the present duty to the new duty when the new duty is input from any one of the plurality of duty calculation units. A PWM signal generation unit generates the PWM signal based on the duty set by the duty setting unit and a carrier signal generated by a carrier signal generation unit.

First claim

What is claimed is:

1. A motor control apparatus comprising:
an inverter circuit including a switching element for driving a motor by turning ON/OFF the switching element;
a PWM signal generation unit that generates a PWM signal for turning ON/OFF the switching element;
a carrier signal generation unit that generates a carrier signal necessary for generating the PWM signal;
a physical quantity detection unit that detects a predetermined physical quantity of the motor, which is generated with drive of the motor;
a command value calculation unit that calculates a command value with respect to the physical quantity of the motor;
a plurality of duty calculation units, each of which compares a value of the physical quantity detected by the physical quantity detection unit with the command value calculated in the command value calculation unit and calculates a duty of the PWM signal based on a deviation between the value of the physical quantity and the command value, wherein the plurality of duty calculation units perform the duty calculations in time division; and
a duty setting unit that performs setting of the duty based on the duty calculated by the plurality of duty calculation units,
wherein the duty setting unit maintains a present duty until new duty is input from any one of the plurality of duty calculation units, and updates the duty from the present duty to the new duty when the new duty is input from any one of the plurality of duty calculation units, and
wherein the PWM signal generation unit generates the PWM signal based on the duty set by the duty setting unit and the carrier signal generated by the carrier signal generation unit.

2. The motor control apparatus according to claim 1 ,
wherein the plurality of duty calculation units include a first duty calculation unit and a second duty calculation unit,
wherein the command value calculation unit includes a first command value calculation unit that supplies the command value to the first duty calculation unit and a second command value calculation unit that supplies the command value to the second duty calculation unit, and
wherein the motor control apparatus further comprises:
a first calculator including the first duty calculation unit and the first command value calculation unit;
a second calculator including the second duty calculation unit and the second command value calculation unit; and
a third calculator including the duty setting unit and the carrier signal generation unit.

3. The motor control apparatus according to claim 2 ,
wherein the duty setting unit comprises a register that stores a numeral value of the duty calculated by the plurality of duty calculation units, and
wherein the duty is updated by rewriting the numerical value stored in the register from the numerical value of the present duty to the numeral value of new duty when the new duty is input from any one of the plurality of duty calculation units.

4. The motor control apparatus according to claim 1 ,
wherein the plurality of duty calculation units include a first duty calculation unit and a second duty calculation unit,
wherein the command value calculation unit includes a single command value calculation unit that supplies the command value to the first duty calculation unit and the second duty calculation unit, and
wherein the motor control apparatus further comprises:
a first calculator comprising the first duty calculation unit;
a second calculator comprising the second duty calculation unit;
a third calculator comprising the duty setting unit and the carrier signal generation unit; and
a fourth calculator comprising the command value calculation unit.

5. The motor control apparatus according to claim 4 ,
wherein the duty setting unit comprises a register that stores a numeral value of the duty calculated by the plurality of duty calculation units, and
wherein the duty is updated by rewriting the numerical value stored in the register from the numerical value of the present duty to the numeral value of new duty when the new duty is input from any one of the plurality of duty calculation units.

6. The motor control apparatus according to claim 1 ,
wherein the duty setting unit comprises a register that stores a numeral value of the duty calculated by the plurality of duty calculation units, and
wherein the duty is updated by rewriting the numerical value stored in the register from the numerical value of the present duty to the numeral value of new duty when the new duty is input from any one of the plurality of duty calculation units.

Assignees

• Ito Naoyuki
• Inoue Hirotaka
• Sato Kei
• Omron Automotive Electronics

Inventors

• Ito Naoyuki
• Inoue Hirotaka
• Sato Kei

Classifications

• B62D5/0484 Primary

  for reaction to failures, e.g. limp home · CPC title

• H02P27/08 Primary

  with pulse width modulation · CPC title

• B62D5/0493

  detecting processor errors, e.g. plausibility of steering direction · CPC title

• H02P6/00

  Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor (vector control H02P21/00) · CPC title

• H02P6/002 Primary

  Electricity · mapped topic