Motor controller
Patent Information
- Authority / Receiving Office
- TW · TW
- Patent Type
- Patents
- Current Assignee / Owner
- GLOBAL MIXED MODE TECH
- Filing Date
- 2025-03-17
- Publication Date
- 2026-08-01
Smart Images
Figure TWG2TB001903859_001 
Figure TWG2TB001903859_002
Abstract
Claims
1. A motor controller comprising: a switching circuit coupled to a motor coil, wherein the switching circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a first terminal, a second terminal, a third terminal, and a fourth terminal, the first transistor being coupled to the first terminal and the third terminal, the second transistor being coupled to the second terminal and the third terminal, the third transistor being coupled to the first terminal and the fourth terminal, and the fourth transistor being coupled to the second terminal and the fourth terminal; and a control circuit generating a first control signal, a second control signal, a third control signal, and a fourth control signal for controlling the first transistor, the second transistor, the third transistor, and the fourth transistor, respectively, wherein when the motor controller enters a braking mode, the control circuit modulates a first on-resistance of the first transistor or a second on-resistance of the second transistor to make a braking current an adjustable value.
2. The motor controller as described in claim 1, wherein when the motor controller enters the braking mode, the control circuit causes the first transistor to be partially turned on.
3. The motor controller as described in claim 1, wherein when the motor controller enters the braking mode, the control circuit causes the second transistor to be partially turned on.
4. The motor controller as described in claim 1, wherein when the motor controller enters the braking mode, the control circuit causes the first transistor to operate in a first linear region.
5. The motor controller as described in claim 1, wherein when the motor controller enters the braking mode, the control circuit causes the second transistor to operate in a second linear region.
6. The motor controller as described in claim 1, wherein when the motor controller enters the braking mode, the control circuit causes both the third transistor and the fourth transistor to be de-conducting.
7. The motor controller as described in claim 1, wherein when the motor controller enters the braking mode, the control circuit causes the first control signal to gradually change from a first low voltage to a first high voltage.
8. The motor controller as described in claim 1, wherein when the motor controller enters the braking mode, the control circuit causes the second control signal to gradually change from a second low voltage to a second high voltage.
9. The motor controller as described in claim 1, wherein the control circuit achieves a power control effect by making the braking current the adjustable value, thereby making both the first transistor and the second transistor operate within a safe range.
10. The motor controller as described in claim 1, wherein the control circuit includes a digital-to-analog converter circuit for providing a first DC voltage to the first control signal and providing a second DC voltage to the second control signal.
11. The motor controller as described in claim 10, wherein the digital-to-analog conversion circuit is an N-bit digital-to-analog converter, where N is a positive integer and N is greater than or equal to 2.
12. The motor controller as described in claim 1, wherein the control circuit includes a digital-to-analog converter circuit, the control circuit modulating the first control signal and the second control signal via the digital-to-analog converter circuit so that the braking current is the adjustable value.
13. The motor controller as described in claim 12, wherein the digital-to-analog conversion circuit is an N-bit digital-to-analog converter, where N is a positive integer and N is greater than or equal to 2.
14. The motor controller as described in claim 1, wherein the first transistor and the second transistor are each an N-type metal-oxide-semiconductor.
15. The motor controller as described in claim 1, wherein the third transistor and the fourth transistor are each a P-type metal-oxide-semiconductor.
16. The motor controller as described in claim 1, wherein the first transistor and the second transistor are each a lower bridge switch.
17. The motor controller as described in claim 1, wherein the third transistor and the fourth transistor are each an upper bridge switch.
18. The motor controller as described in claim 1, wherein the motor controller is applied to a high-voltage configuration.
19. The motor controller as described in claim 1, wherein the motor controller is applied to a single-phase motor.
20. The motor controller as described in claim 1, wherein the motor controller is applied to a three-phase motor.
21. The motor controller as described in claim 1, wherein the motor controller is applied to a DC motor.
22. The motor controller as described in claim 1, wherein the motor controller is applied to a brushless motor.
23. The motor controller as described in claim 1, wherein the motor controller is a fan motor controller.