Motor controller and motor assembly

• US 8,378,616 B2
• Filed: 01/28/2009
• Issued: 02/19/2013
• Est. Priority Date: 01/28/2008
• Status: Active Grant

• Current Assignee: Johnson Electric International AG (Johnson Electric Holdings Limited)
• Original Assignee: Johnson Electric SA 125 Rue de Progres La Chaux de Fonds Switzerland (Johnson Electric Holdings Limited)
• Inventors: Sun, Chiping, Xue, Yanhong
• Primary Examiner(s): Benson, Walter
• Assistant Examiner(s): CARRASQUILLO, JORGE L
• Application Number:
  US12/360,888
• Publication Number:
  US 20090189550A1
• Time in Patent Office: 1,483 Days
• Field of Search: 318/116, 318/727, 318/569, 318/575, 700/245, 701/82, 709/212, 369/34, 400/114.2, 400/70, 400/320, 710/28
• US Class Current: 318/696
• CPC Class Codes: H02N 2/0075 Electrical details, e.g. drive or control circuits or methods
• CPC Class Codes: H02P 5/68 controlling two or more dc dynamo-electric motors H02P5/46, H02P5/60 take precedence

Abstract

Apparatus, having multiple motor modules, has an MCU module. Each motor module has an electronically controlled motor. The MCU module has an MCU and an interface for connecting to a bus from a CPU. In use the MCU module receives control signals from the CPU and in turn instructs a selected one of the motors to operate.

Claims

1. A motor controller for controlling a plurality of motor modules in response to signals from a CPU, each motor module having an electronically controlled motor and an Identifier, the motor controller comprising:

a first bus coupled to the CPU;

a MCU module having a MCU and a bus driver enabling the MCU to receive signals via the first bus; and

a second bus coupled between the MCU module and the plurality of motor modules;

wherein the MCU module is coupled to the Identifiers of the plurality of motor modules via the second bus and is configured to receive control signals from the CPU and in turn selectively instruct at least one electrically controlled motor to operate via the Identifiers of corresponding motor modules.

2. The motor controller of claim 1, wherein:

each motor module further includes a power switch; and

the second bus carries only control signals for controlling the plurality of motor modules.

3. The motor controller of claim 1, wherein:

the MCU module further includes a power switch circuit; and

the second bus carries control signals for controlling the plurality of motor modules as well as power signals to selectively operate the at least one selected motor.

4. The motor controller of claim 1, wherein the electrically controlled motors include piezoelectric motors.

5. The motor controller of claim 4, wherein the second bus carries high voltage AC signals for driving the at least one selected piezoelectric motor.

6. The motor controller of claim 1, wherein each of the plurality of motor modules further comprises a feedback sensor for providing information to the MCU about a condition of the motor.

7. A motor assembly operated in response to signals from a CPU, comprising:

a first bus coupled to the CPU;

a MCU module having a MCU and a bus driver enabling the MCU to receive signals via the first bus;

a second bus coupled to the MCU module; and

a plurality of motor modules, each having an Identifier coupled to the second bus and a motor couple to the Identifier;

wherein the MCU is configured to receive control signals from the CPU via the first bus and information from the Identifiers via the second bus and in turn selectively instructs at least one electrically controlled motor to operate based on the information.

8. The motor assembly of claim 7, wherein each motor module further includes a power switch and the second bus carries only control signals for controlling the plurality of motor modules.

9. The motor assembly of claim 7, wherein the MCU module further includes a power switch circuit and the second bus carries control signals for controlling the plurality of motor modules as well as power signals to selectively operate the at least one selected motor.

10. The motor assembly of claim 7, wherein the electrically controlled motors includes piezoelectric motors.

11. The motor assembly of claim 10, wherein the second bus carries high voltage AC signals for driving the at least one selected piezoelectric motor.

12. The motor assembly of claim 7, wherein each of the plurality of motor modules further comprises a feedback sensor for providing information to the MCU about a condition of the motor.