Dual-voltage brushless motor

Patent metadata

Field	Value
Publication number	US-10367435-B2
Application number	US-201515543254-A
Country	US
Kind code	B2
Filing date	Jan 20, 2015
Priority date	Jan 20, 2015
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

A dual-voltage brushless motor ( 30 ) includes a casing, a motor shaft ( 20 ) rotatably coupled to the casing, a rotor fixedly connected to the motor shaft ( 20 ), and a stator ( 28 ) configured to face the motor. The rotor contains a plurality of permanent magnets, and the stator ( 28 ) includes a first set of winding and a second set of winding. The first winding is electrically isolated from the second winding. The dual-voltage brushless motor ( 30 ) is adapted to be driven when the first set of winding receives a first control signal or when the second set of winding receives a second control signal. By configuring two separate motor controllers of the motor, the motor ( 30 ) can be operated under different power supplies such as AC power supply and DC power supply. As a result the application of the motor is greatly extended.

First claim

The invention claimed is:

1. A dual-voltage brushless motor, comprising:
a) a casing;
b) a motor shaft rotatably coupled to said casing;
c) a rotor fixedly connected to said motor shaft; said rotor comprising a plurality of permanent magnets; and
d) a stator configured to face said rotor; wherein said stator comprising a first set of windings and a second set of windings;
wherein the first set of windings is in electrical communication with an AC power supply, wherein the second set of windings is in electrical communication with a DC power supply, wherein said first set of windings is electrically isolated from said second set of windings; and
wherein said dual-voltage brushless motor is driven when said first set of windings receives a first control signal or when said second set of windings receives a second control signal.

2. The dual-voltage brushless motor of claim 1 , wherein said first control signal and said second control signal are different in mean voltage.

3. The dual-voltage brushless motor of claim 1 , further comprises a first controller and a second controller, said first set of windings further comprising three-phase windings connected to said first controller; said second set of windings further comprising three-phase windings connected to said second controller.

4. The dual-voltage brushless motor of claim 3 , further comprises a rectifying circuit, said first controller connected to the AC power supply via said rectifying circuit.

5. The dual-voltage brushless motor of claim 4 , wherein said rectifying circuit is adapted to receive 120V or 230V AC voltage from said AC power supply.

6. The dual-voltage brushless motor of claim 3 , wherein said second controller is connected to the DC power supply, wherein the DC power supply is a battery pack.

7. The dual-voltage brushless motor of claim 6 , wherein said second controller is adapted to receive 18V, 36V, 48V or 56V DC voltage from said battery pack.

8. The dual-voltage brushless motor of claim 1 , further comprising a first circuit board fixed to one end of said stator of said motor, and a plurality of Hall sensors configured on said first circuit board and connected to said first controller.

9. The dual-voltage brushless motor of claim 8 , further comprising a second circuit board fixed to another end of said stator of said motor; and a plurality of Hall sensors configured on said second circuit board and connected to said second controller.

10. The dual-voltage brushless motor of claim 1 , further comprising a first circuit board fixed to one end of said stator of said motor; and a plurality of Hall sensors configured on said first circuit board and connected to said first controller and said second controller.

Assignees

• Techtronic Ind Co Ltd

Inventors

• Chang Yijia
• Lee Heiman

Classifications

• H02P25/22

  Multiple windings; Windings for more than three phases · CPC title

• H02P6/08

  Arrangements for controlling the speed or torque of a single motor (H02P6/10, H02P6/28 take precedence) · 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

• H02P27/06 Primary

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title

• H02K5/00

  Casings; Enclosures; Supports · CPC title