Title:
CONTROL CIRCUIT FOR HIGH-SPEED FAN
Document Type and Number:
WIPO Patent Application WO/2018/205452
Kind Code:
A1
Abstract:
Disclosed is a control circuit for a high-speed fan. A first resistor (R11) is connected to a second resistor (R12) in series. A third resistor (R14) is connected to a fourth resistor (R15) in series. A fifth resistor (R17) is connected to a sixth resistor (R18) in series. The second resistor (R12), the fourth resistor (R15) and the sixth resistor (R18) are respectively connected to a three-phase contact on a three-phase sensorless and brushless motor. One end of each of three comparators (U21, U22, U23), a seventh resistor (R13) and an eighth resistor (R16) is connected to one end of a ninth resistor (R10). A first connection point between the first resistor (R11) and the second resistor (R12), a second connection point between the third resistor (R14) and the fourth resistor (R15), and a third connection point between the fifth resistor (R17) and the sixth resistor (R18) are respectively connected to the other end of each of the ninth resistor (R10), the seventh resistor (R13) and the eighth resistor (R16). In-phase input ends of the three comparators are respectively connected to the first connection point, the second connection point and the third connection point. According to the control circuit, the computation pressure of a microcontroller unit is reduced by means of simplifying the computation of a zero-cross signal, and the computation process is optimized and costs are reduced.
Inventors:
LIN YUAN (CN)
YI ERXUAN (CN)
YI ERXUAN (CN)
Application Number:
PCT/CN2017/098880
Publication Date:
November 15, 2018
Filing Date:
August 24, 2017
Export Citation:
Assignee:
SHENZHEN WIZEVO TECH CO LTD (CN)
International Classes:
H02P6/14
Foreign References:
| CN102629846A | 2012-08-08 | |||
| CN103018541A | 2013-04-03 | |||
| CN102647151A | 2012-08-22 | |||
| US20130249459A1 | 2013-09-26 |
Attorney, Agent or Firm:
WUXI HUICHENGYONGXIN PATENT FIRM (GENERAL PARTNERSHIP) (CN)
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