Control apparatus and control method of on-vehicle dynamo-electric machine

• US 20030030409A1
• Filed: 07/25/2002
• Published: 02/13/2003
• Est. Priority Date: 08/10/2001
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Nishimura, Shinji, Wada, Noriyuki, Nakayama, Masakazu, Kusumoto, Katsuhiko
• Granted Patent: US 6,771,040 B2
• Time in Patent Office: Days
• US Class Current: 318/801
• CPC Class Codes: H02P 9/305 controlling voltage H02P9/302 takes precedence

Abstract

A control apparatus and a control method of an on-vehicle dynamo-electric machine 1 are provided for efficiently controlling functions as a starter-motor and as a charging generator. In case that the dynamo-electric machine 1 acts as a charging generator, when a rotation speed of the dynamo-electric machine 1 is not higher than a predetermined value, a power is generated by applying a compensation current from and inverter to an armature coil 3 for phase control. On the other hand, when a rotation speed of the dynamo-electric machine 1 is not lower than a predetermined value, operation of the inverter is stopped. Thus, controlling a current applied to a field coil 4 by a field coil current control means 5 generates a predetermined target voltage.

Claims

1. A control apparatus of an on-vehicle dynamo-electric machine comprising:

an armature coil and a field coil;

a dynamo-electric machine for acting as a starter-motor and as a charging generator that is combined with an on-vehicle internal combustion engine;

switching elements that are bridge connected;

an inverter for supplying an ac to said armature coil of said dynamo-electric machine;

a field current control means for controlling a current of said field coil; and

control means for applying a PWN signal to the switching elements of the inverter and controlling the a current supplied to said field coil;

wherein, when said dynamo-electric machine acts as a charging generator, if a rotation speed of said dynamo-electric machine is not higher than a predetermined value, said control means generates a power by applying a compensation current for phase control from said inverter to said armature coil; and

when a rotation speed of said dynamo-electric machine is not lower than a predetermined value, said control means stops the operation of said inverter so that controlling the current applied to said field coil by said field coil current control means generates a predetermined target voltage.

2. The control apparatus of an on-vehicle dynamo-electric machine according to claim 1, wherein at the time of shifting from a power generation by application of a current by said inverter to a power generation of a target voltage by controlling said field current, as well as at the time of shifting from a power generation of a target voltage by controlling said field current to a power generation by application of a current by said inverter, said control means interrupts said filed current for a predetermined time.

3. The control apparatus of an on-vehicle dynamo-electric machine according to claim 1, wherein, when said dynamo-electric machine acts as a starter-motor, said control means controls said field current control means so as to increase the field current to not lower than a rated value.

4. The control apparatus of an on-vehicle dynamo-electric machine according to claim 1, wherein, when said dynamo-electric machine acts as a starter-motor, said control means detects a rotation speed of said dynamo-electric machine, and any power is not supplied to said dynamo-electric machine in the event that the rotation speed before turning on the power is exceeding a predetermined value.

5. A method of controlling an on-vehicle dynamo-electric machine that is mounted on an internal combustion engine for vehicles and acts as a starter-motor at the time of starting said internal combustion engine and as a charging generator after starting said internal combustion engine;

wherein, when said dynamo-electric machine acts as a charging generator, a target voltage is generated by controlling a field current under normal operating condition, and under the conditions that engine speed of said internal combustion engine is lowered and a voltage generated by said dynamo-electric machine does not reach the target voltage, a power is generated by applying a compensation current for phase control from on-vehicle batteries to an armature coil of said dynamo-electric machine via an inverter.

6. The method of controlling an on-vehicle dynamo-electric machine according to claim 5, wherein at the time of shifting from a power generation by application of a current by said inverter to a power generation of a target voltage by controlling said field current, as well as at the time of shifting from a power generation of a target voltage by controlling said field current to a power generation by application of a current by said inverter, the filed current is interrupted for a predetermined time, and the shifting is carried out after dropping the voltage generated by said dynamo-electric machine.

7. The method of controlling anon-vehicle dynamo-electric machine according to claim 5, wherein, when said dynamo-electric machine acts as a starter-motor for starting an internal combustion engine, the field current control is increased to not lower than a rated value.

8. The method of controlling anon-vehicle dynamo-electric machine according to claim 5, wherein, when said dynamo-electric machine acts as a starter-motor, a rotation speed of said dynamo-electric machine is detected, and the dynamo-electric machine does not act as a starter-motor in the event that the rotation speed is exceeding a predetermined value.