Title:
AUTOMATIC COFFEE MACHINE AND ELECTRIC MOTOR CONTROL CIRCUIT THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/001218
Kind Code:
A1
Abstract:
An automatic coffee machine and an electric motor control circuit thereof. The electric motor control circuit of the automatic coffee machine comprises a power supply circuit, an H-bridge drive circuit, a first sampling circuit, a second sampling circuit, an MCU and an electric motor; the H-bridge drive circuit drives the forward and reverse rotation of the electric motor according to a control signal output by the MCU; the first sampling circuit samples a current when the electric motor rotates forward, converts the sampled current into a first voltage signal, and performs amplification filtering on the first voltage signal; the second sampling circuit samples a current when the electric motor rotates in reverse, converts the sampled current into a second voltage signal, and performs amplification filtering on the second voltage signal; when the first voltage signal or/and the second voltage signal is greater than a preset voltage threshold, the MCU outputs a corresponding control signal to the H-bridge drive circuit so as to control the electric motor to stop working.
Inventors:
LIU YUANJIANG (CN)
ZUO ZIXIONG (CN)
ZHOU ZHONGHOU (CN)
SHI GONGLEI (CN)
LIU PENG (CN)
ZUO ZIXIONG (CN)
ZHOU ZHONGHOU (CN)
SHI GONGLEI (CN)
LIU PENG (CN)
Application Number:
PCT/CN2019/088906
Publication Date:
January 02, 2020
Filing Date:
May 29, 2019
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H02P7/03
Foreign References:
| CN108768227A | 2018-11-06 | |||
| CN205901646U | 2017-01-18 | |||
| CN102611077A | 2012-07-25 | |||
| CN201135367Y | 2008-10-22 |
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