Fan motor braking apparatus and the control method thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02P-003/12
H02P-027/08
F04D-025/06
F04D-027/00
H02P-006/08
H02P-006/16
H02P-006/24
출원번호
US-0335804
(2016-10-27)
등록번호
US-10103676
(2018-10-16)
우선권정보
CN-2016 1 0595028 (2016-07-26)
발명자
/ 주소
Tseng, Wei-Shuo
Wu, Chia-Feng
Cho, Yi-Chieh
Chao, Yun-Hua
Chen, Po-Tsun
출원인 / 주소
DELTA ELECTRONICS, INC.
대리인 / 주소
Muncy, Geissler, Olds & Lowe, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
A fan motor braking apparatus includes a fan motor, a conversion circuit and a motor driver circuit. The conversion circuit is respectively and electrically connected to the fan motor and the motor driver circuit. The conversion circuit includes bridge structures. After the fan motor starts operatin
A fan motor braking apparatus includes a fan motor, a conversion circuit and a motor driver circuit. The conversion circuit is respectively and electrically connected to the fan motor and the motor driver circuit. The conversion circuit includes bridge structures. After the fan motor starts operating, the motor driver circuit receives at least one fan status signal and determines whether the fan motor braking apparatus enters a braking status or not according to the at least one fan status signal. When the fan motor braking apparatus enters the braking status, the motor driver circuit outputs a braking control signal to the conversion circuit so that the bridge structures of the conversion circuit generate a brake effect on fan motor, wherein the at least one fan status signal includes an external speed-control signal and a transition voltage signal of the fan motor.
대표청구항▼
1. A fan motor braking apparatus, comprising: a fan motor;a conversion circuit, electrically connected to the fan motor and comprising a plurality of bridge structures; anda motor driving IC, electrically connected to the conversion circuit and receiving at least one fan status signal, wherein after
1. A fan motor braking apparatus, comprising: a fan motor;a conversion circuit, electrically connected to the fan motor and comprising a plurality of bridge structures; anda motor driving IC, electrically connected to the conversion circuit and receiving at least one fan status signal, wherein after the fan motor starts operating, the motor driving IC determines whether the fan motor braking apparatus is in a brake status or not according to the at least one fan status signal;wherein when the fan motor braking apparatus is in the brake status, the motor driving IC outputs a brake control signal to the conversion circuit so that the bridge structures of the conversion circuit turn on to stop the fan motor;wherein the at least one fan status signal comprises an external speed-control signal or at least one conversion voltage signal from the fan motor;wherein when the motor driving IC detects the at least one conversion voltage signal has no change in voltage during a detection period, the motor driving IC informs the fan motor apparatus to be in the brake status, and after at least a mask time during which the fan motor stays in the brake status, the motor driving IC detects the at least one conversion voltage signal again, and if the at least one conversion voltage signal has no change in voltage again, the motor driving IC outputs an alert signal for indicating that the fan motor is in a locked status for a long time, which is longer than the mask time. 2. The fan motor braking apparatus of claim 1, electrically connected to a power source, the power source provides a supply voltage signal to the motor driving IC, wherein the motor driving IC determines whether the fan motor is on or not according to the supply voltage signal; and wherein when voltage level of the supply voltage signal is pulled from low to high by powering on the fan motor braking apparatus, the motor driving IC informs the fan motor braking apparatus to be in the brake status. 3. The fan motor braking apparatus of claim 1, wherein the external speed-control signal is a pulse width modulation signal; wherein when a duty cycle of the pulse width modulation signal is less than a default first duty cycle, the motor driving IC informs the fan motor braking apparatus to be in the brake status; andwherein the fan motor is a single-phase motor or a three-phase motor. 4. The fan motor braking apparatus of claim 1, wherein the external speed-control signal is a detection voltage signal; wherein when the speed-control signal is lower than a default first voltage, the motor driving IC informs the fan motor braking apparatus to be in the brake status; andwherein the fan motor is a single-phase motor or a three-phase motor. 5. The fan motor braking apparatus of claim 1, further comprising a first resistor, a second resistor and a third resistor electrically connected to the fan motor, wherein there is no Hall sensor installed in the fan motor; wherein the fan motor is a three-phase motor, and the at least one conversion voltage signal comprises a first conversion voltage signal, a second conversion voltage signal and a third conversion voltage signal; andwherein the motor driving IC obtains the first conversion voltage signal, the second conversion voltage signal and the third conversion voltage signal respectively sampled from the first resistor, the second resistor and the third resistor. 6. The fan motor braking apparatus of claim 1, further comprising a Hall sensor electrically connected to the motor driving IC, wherein the fan motor is a single-phase motor or a three-phase motor and the at least one conversion voltage signal is at least one Hall signal of the Hall sensor. 7. The fan motor braking apparatus of claim 1, further comprising a Hall sensor electrically connected to the motor driving IC, wherein the fan motor is a three-phase motor, and the at least one conversion voltage signal are a first Hall signal, a second Hall signal and a third Hall signal of the Hall sensor; and wherein when the motor driving IC detects the first Hall signal, the second Hall signal and the third Hall signal to determine that speed of the fan motor is lower than a default minimum fan speed, the motor driving IC informs the fan motor braking apparatus to be in the brake status. 8. The fan motor braking apparatus of claim 1, further comprising a Hall sensor electrically connected to the motor driving IC, wherein the fan motor is a single-phase motor, and the at least one conversion voltage signal is a first Hall signal of the Hall sensor; and wherein when the motor driving IC detects the first Hall signal to determine that the speed of the fan motor is lower than a default minimum fan speed, the motor driving IC informs the fan motor braking apparatus to be in the brake status. 9. A control method applied in a fan motor braking apparatus, the control method comprising: after a fan motor of the fan motor braking apparatus starts operating, receiving at least one fan status signal;determining whether the fan motor braking apparatus is in a brake status or not according to the at least one fan status signal;when the fan motor braking apparatus is in the brake status, outputting a brake control signal to a conversion circuit of the fan motor braking apparatus so that a plurality of bridge structures of the conversion circuit turn on to stop the fan motor, wherein the at least one fan status signal comprises an external speed-control signal or at least one conversion voltage signal from the fan motor;wherein when the at least one conversion voltage signal is detected as having no change in voltage during a detection period, informing the fan motor apparatus to be in the brake status, and after at least a mask time during which the fan motor stays in the brake status, detecting the at least one conversion voltage signal again, and if the at least one conversion voltage signal has no change in voltage again, outputting an alert signal for indicating that the fan motor is in a locked status for a long time, which is longer than the mask time. 10. The control method applied in the fan motor braking apparatus of claim 9, wherein when the fan motor is on, determining whether the fan motor is on or not according to a supply voltage signal of the fan motor braking apparatus; and wherein when voltage level of the supply voltage signal is pulled from low to high, informing the fan motor braking apparatus to be in the brake status. 11. The control method applied in the fan motor braking apparatus of claim 9, wherein the external speed-control signal is a pulse width modulation signal; wherein when a duty cycle of the pulse width modulation signal is less than a default first duty cycle, informing the fan motor braking apparatus to be in the brake status; andwherein the fan motor is a single-phase motor or a three-phase motor. 12. The control method applied in the fan motor braking apparatus of claim 9, wherein the external speed-control signal is a detection voltage signal; wherein when the speed-control signal is lower than a default first voltage, informing the fan motor braking apparatus to be in the brake status; andwherein the fan motor is a single-phase motor or a three-phase motor. 13. The control method applied in the fan motor braking apparatus of claim 9, wherein there is no Hall sensor installed in the fan motor; wherein the fan motor is a three-phase motor, and the at least one conversion voltage signal comprises a first conversion voltage signal, a second conversion voltage signal and a third conversion voltage signal; andwherein the first conversion voltage signal, the second conversion voltage signal and the third conversion voltage signal are respectively sampled from a first resistor, a second resistor and a third resistor of the fan motor braking apparatus. 14. The control method applied in the fan motor braking apparatus of claim 9, wherein the fan motor is a single-phase motor or a three-phase motor and the at least one conversion voltage signal is at least one Hall signal of the Hall sensor. 15. The control method applied in the fan motor braking apparatus of claim 9, wherein the fan motor is a three-phase motor, and the at least one conversion voltage signal is a first Hall signal, a second Hall signal and a third Hall signal of a Hall sensor of the fan motor braking apparatus; and wherein when the first Hall signal, the second Hall signal and the third Hall signal are detected to determine that the speed of the fan motor is lower than a default minimum fan speed, informing the fan motor braking apparatus to be in the brake status. 16. The control method applied in the fan motor braking apparatus of claim 9, further comprising a Hall sensor electrically connected to the motor driving IC, wherein the fan motor is a single-phase motor, and the at least one conversion voltage signal is a first Hall signal of a Hall sensor of the fan motor braking apparatus; and wherein when the first Hall signal is detected to determine that the speed of the fan motor is lower than a default minimum fan speed, informing the fan motor braking apparatus to be in the brake status.
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이 특허에 인용된 특허 (2)
Gohara, Yuki; Mishima, Tomofumi, Fan motor driving means, driving method, and cooling device and electronic equipment using the same.
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