MOTOR CONTROL SYSTEM, MOTOR CONTROL METHOD, AND MOTOR CONTROL DEVICE

• US 20140200732A1
• Filed: 04/24/2013
• Published: 07/17/2014
• Est. Priority Date: 06/12/2012
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Sato, Daisuke
• Granted Patent: US 9,785,156 B2
• Time in Patent Office: Days
• US Class Current: 700/300
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 1/02 to electric heating circuits
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/14 Acceleration
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 58/18 of two or more battery modules
• CPC Class Codes: B60L 58/26 by cooling
• CPC Class Codes: B60R 16/02 electric constitutive elements
• CPC Class Codes: G05D 23/1917 using digital means
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A host controller is incorporated with a plurality of different pieces of control software which are applicable to a plurality of destinations for a cooling blower to cool a main battery incorporated in a vehicle. The host controller transmits a destination-signal request pattern for requesting a destination signal pattern to specify the determinations for the cooling blower, to a motor control device by means of a PWM signal. Upon receiving the destination-signal request pattern, the motor control device transmits the destination signal pattern to the host controller. The host controller specifies one of the destinations for the cooling blower from the received destination signal pattern, and then changes over the control software to the control software applicable to the specified destination for the cooling blower.

Claims

1. A motor control system, comprising:

a motor control device for controlling a motor of a cooling blower for cooling a battery incorporated in a vehicle; and

a host controller including a plurality of different pieces of control software applicable to a plurality of destinations for the cooling blower, the host controller transmitting and receiving control information of the motor to and from the motor control device by means of a PWM signal, wherein

the host controller transmits, to the motor control device by means of the PWM signal, a destination-signal request pattern for requesting a destination signal pattern to specify the destinations;

the motor control device transmits the destination signal pattern to the host controller upon receiving the destination-signal request pattern; and

the host controller specifies one of the destinations for the cooling blower from the destination signal pattern and changes over the control software to the control software applicable to the specified one of destinations for the cooling blower.

2. The motor control system according to claim 1, wherein

the host controller modulates a PWM duty ratio of the PWM signal according to a target rotating-speed of the motor and then transmits the PWM signal to the motor control device;

the motor control device reconstructs the target rotating-speed from the received PWM signal and controls a rotating-speed of the motor; and

the motor control device modulates a PWM frequency of the PWM signal by an actual rotating-speed information of the motor and then transmits the PWM signal to the host controller.

3. The motor control system according to claim 2, wherein the destination-signal request pattern and the destination signal pattern are generated based on the PWM frequency, the PWM duty ratio, and a signal output time.

4. A method for controlling a motor of a cooling blower cooling a battery incorporated in a vehicle, wherein a host controller transmits and receives control information of the motor to and from a motor control device by means of a PWM signal, the host controller being incorporated with a plurality of different pieces of control software applicable to a plurality of destinations for the cooling blower, the motor control device controlling the motor, the method comprising the steps of:

transmitting by the host controller a destination-signal request pattern to the motor control device by means of the PWM signal, the destination-signal request pattern requesting a destination signal pattern to specify the destinations for the cooling blower;

determining by the motor control device whether the destination-signal request pattern is contained in the PWM signal, upon receiving the PWM signal;

generating by the motor control device the PWM signal based on the destination signal pattern when the destination-signal request pattern is contained or generating by the motor control device the PWM signal based on an actual rotating-speed information of the motor when the destination-signal request pattern is not contained, and transmitting by the motor control device the generated PWM signal to the host controller; and

detecting by the host controller the destination signal pattern from the received PWM signal, specifying by the host controller one of the destinations for the cooling blower from the detected destination signal pattern, and switching over, by the host controller, to the control software applicable to the specified destination for the cooling blower.

5. A motor control device for controlling a motor of a cooling blower based on a PWM signal, the cooling blower cooling a battery incorporated in a vehicle, the PWM signal being received from a host controller, the motor control device comprising:

a PWM-signal detecting unit for detecting a PWM frequency and a PWM duty ratio of the PWM signal;

a request-pattern determination unit for determining whether the PWM signal contains a destination-signal request pattern for requesting a destination signal pattern to specify destination for the cooling blower, based on an output of the PWM-signal detecting unit; and

a PWM-signal generation unit for generating the PWM signal based on a determination result of the request-pattern determination unit, wherein the PWM-signal generation unit generates the PWM signal based on the destination signal pattern when the destination-signal request pattern is contained or the PWM-signal generation unit generates the PWM signal based on an actual rotating-speed information of the motor when the destination-signal request pattern is not contained; and

the PWM-signal generation unit transmits the generated PWM signal to the host controller.

6. The motor control device according to claim 5, wherein the PWM-signal detecting unit includes:

a rising-edge detecting unit for detecting a rising-edge of the PWM signal;

an edge-period detecting unit for detecting the PWM frequency based on an output of the rising-edge detecting unit; and

a duty-ratio detecting unit for detecting the PWM duty ratio based on the output of the rising-edge detecting unit.

7. The motor control device according to claim 5, wherein the PWM-signal generation unit includes:

a frequency computing unit for computing the PWM frequency;

a duty-ratio computing unit for computing the PWM duty ratio; and

a PWM-signal output unit for generating the PWM signal based on the PWM frequency and the PWM duty ratio.