Control device for plurality of rotating electrical machines

• US 6,624,601 B2
• Filed: 08/29/2001
• Issued: 09/23/2003
• Est. Priority Date: 10/16/2000
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Nakano, Masaki, Arimitsu, Minoru
• Primary Examiner(s): Nappi, Robert E.
• Assistant Examiner(s): SMITH, TYRONE W
• Application Number:
  US09/940,546
• Publication Number:
  US 20020057065A1
• Time in Patent Office: 755 Days
• Field of Search: 318/34, 318/43, 318/49, 318/432, 318/439, 318/815, 318/801, 318/811, 318/800, 318/434, 310/114
• US Class Current: 318/34
• CPC Class Codes: B60L 15/025 using field orientation; Vector control; Direct Torque Control [DTC]
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 50/60 using power supplied by batteries in combination with fuel cells B60L50/75
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• 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
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

A control device for a plurality of rotating electrical machines has a single current control device with an inverter, gate driver, and a motor controller, which supplies a control current to each rotating electrical machine allowing rotation control in response to the rotational phase of the rotor. In this control device, the current control device determines the control current of each rotating electrical machine based on the target torques and rotational angular velocities of all rotating electrical machines, and supplies a composite current obtained by combining the determined control currents for each rotating electrical machine to all rotating electrical machine.

In this control device for a plurality of rotating electrical machines, the required voltage does not exceed the voltage of the power source and the peak value of the composite current does not exceed the permitted range of the inverter.

Claims

1. A control device for a plurality of rotating electrical machines, comprising:

an inverter connected to the plurality of rotating electrical machines;

a sensor for detecting a rotational angular velocity and a rotational phase of a rotor in each rotating electrical machine; and

a motor controller configured to;

determine a control current of each rotating electrical machine based on target torques of all of the plurality of rotating electrical machines and the rotational angular velocities of all of the plurality of rotating electrical machines;

control the inverter to supply a composite current to all of the plurality of rotating electrical machines, the composite current being a combination of the control currents for each rotating electrical machine; and

determine the control current of each rotating electrical machine so that an average current value of the composite current takes a minimum value, while maintaining the target torques of all of the plurality of rotating electrical machines.

4. The control device for a plurality of rotating electrical machine as defined by claim 1,

wherein the controller comprises a microprocessor.

5. The control device for a plurality of rotating electrical machines as defined by claim 1, further comprising a sensor for detecting a temperature of each rotating electrical machine,

wherein the controller minimizes the average current value of the composite current when the temperatures of all rotating electrical machines are lower than a permitted temperature.

7. The control device for a plurality of rotating electrical machines as defined by claim 1, wherein one rotating electrical machine is connected to an engine.

2. A control device for a plurality of rotating electrical machines, comprising:

an inverter connected to the plurality of rotating electrical machines;

a sensor for detecting a rotational angular velocity and a rotational phase of a rotor in each rotating electrical machine; and

a motor controller configured to;

determine a control current of each rotating electrical machine based on target torques of all of the plurality of rotating electrical machines and the rotational angular velocities of all of the plurality of rotating electrical machines;

control the inverter to supply a composite current to all of the plurality of rotating electrical machines, the composite current being a combination of the control currents for each rotating electrical machine; and

determine the control current of each rotating electrical machine so that the average value of the control current of a specific rotating electrical machine takes a minimum value, while maintaining the target torques of all of the plurality of rotating electrical machines.

3.A control device for a plurality of rotating electrical machines, comprising;

an inverter connected to the plurality of rotating electrical machines;

a sensor for detecting a rotational angular velocity and a rotational phase of a rotor in each rotating electrical machine; and

a motor controller configured to;

determine a control current of each rotating electrical machine based on target torques of all of the plurality of rotating electrical machines and the rotational angular velocities of all of the plurality of rotating electrical machines; and

control the inverter to supply a composite current to all of the plurality of rotating electrical machines, the composite current being a combination of the control currents for each rotating electrical machine; and

wherein the controller has a plurality of means for determining the control current for each rotating electrical machine, and selectively switches the use of the plurality of means in accordance with conditions of the plurality of rotating electrical machines.

3. The control device for a plurality of rotating electrical machines as defined by claim 2, further comprising a sensor for detecting a temperature of each rotating electrical machine,

wherein the controller further functions to determine the control current of each rotating electrical machine so that the average value of the control current of a rotating electrical machine, whose temperature has exceeded a permitted temperature, takes a minimum value.

6. The control device for a plurality of rotating electrical machines as defined by claim 3, wherein a plurality of means for determining the control current for each rotating electrical machine comprises a first means for minimizing the average current value of the composite current and a second means for minimizing the average value of the control current of a specific rotating electrical machine.

8. A control device for a plurality of rotating electrical machines, comprising:

an inverter connected to the plurality of rotating electrical machines,

a sensor for detecting a rotational angular velocity and a rotational phase of the rotor in each rotating electrical machine;

a sensor for detecting a temperature of each rotating electrical machine, and

a motor controller configured to;

determine a control current of each rotating electrical machine based on target torques of all of the plurality of rotating electrical machines and the rotational angular velocities of all of the plurality of rotating electrical machines; and

control the inverter to supply a composite current to all of the plurality of rotating electrical machines, the composite current being a combination of the control currents for each rotating electrical machine,

wherein the motor controller minimizes an average current value of the composite current while maintaining the target torques of all of the plurality of electrical machines, when the temperatures of all of the plurality of rotating electrical machines are lower than a permitted temperature, and

wherein the motor controller minimizes the control current of a specific rotating electrical machine while maintaining the target torques of all of the rotating electrical machines, when the temperature of a specific rotating electrical machine exceeds the permitted temperature.