Electronic device having delay circuit for synchronous starting of two operating components

Patent metadata

Field	Value
Publication number	US-10256750-B2
Application number	US-201615288726-A
Country	US
Kind code	B2
Filing date	Oct 7, 2016
Priority date	Oct 9, 2015
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

A circuit includes a first operating component, a second operating component and a starting time control circuit. The starting voltage of the first operating component is different from that of the second operating component, and the starting time control circuit is configured to regulate a starting time of the first operating component to be synchronous with that of the second operating component.

First claim

The invention claimed is:

1. An electronic device, comprising a motor and a motor drive circuit, wherein the motor drive circuit comprises a first operating component and a second operating component, wherein,
the motor drive circuit further comprises a time delay circuit configured to delay a starting time of the first operating component to be synchronous with that of the second operating component; thereby enabling the first operating component and the second operating component to be synchronously started;
wherein the electronic device further comprises a rectifier, wherein,
the rectifier comprises a first output terminal and a second output terminal; and
the time delay circuit is connected in series with the first operating component, a series branch of the time delay circuit and the first operating component is connected in parallel with the second operating component across the first output terminal and the second output terminal, and the time delay circuit is configured to adjust a voltage outputted by the first output terminal and provide the adjusted voltage for the first operating component, so that a voltage provided for the first operating component rises to a first preset value that enables starting of the first operating component when a voltage provided for the second operating component by the first output terminal rises to a second preset value that enables starting of the second operating component.

2. The electronic device according to claim 1 , wherein the time delay circuit comprises a voltage division unit and a power-on unit, the voltage division unit has a turn-on voltage, and is turned on and clamped at the turn-on voltage in a case that a voltage applied to the voltage division unit is higher than or equal to the turn-on voltage, and the power-on unit is configured to generate a voltage and provide the voltage for the first operating component, after the voltage division unit is turned on, wherein a sum of the turn-on voltage of the voltage division unit and the first preset value is equal to the second preset value.

3. The electronic device according to claim 1 , further comprising an inverter connected the motor, wherein the first operating component is a position detector and a motor driver configured to detect a rotational position of a rotor of the motor and output trigger signals, the second operating component is a switch driver configured to drive the inverter to convert a direct current into an alternating current.

4. The electronic device according to claim 1 , wherein the first preset value is lower than that of the second preset value.

5. The electronic device according to claim 1 , wherein the motor is a single phase direct current brushless motor.

6. The electronic device according to claim 2 , wherein the voltage division unit comprises a Zener diode, the power-on unit comprises a resistor, a cathode of the Zener diode is electrically connected to the first output terminal, an anode of the Zener diode is electrically connected to the first operating component and electrically connected to the second output terminal via the resistor, and a breakdown voltage of the Zener diode is a difference between the first preset value and the second preset value.

7. The electronic device according to claim 3 , wherein the inverter is an H-bridge circuit comprising a number of semiconductor switch transistors, the semiconductor switch transistors are MOSFETs, and the switch driver is a MOSFET driver.

8. The electronic device according to claim 7 , wherein,
the switch driver comprises a first half-bridge driver, a second half-bridge driver, a first phase inverter and a second phase inverter, the position detector and motor driver comprises a first trigger terminal and a second trigger terminal, the first half-bridge driver comprises a first input terminal, a second input terminal, a first output terminal and a second output terminal, and the second half-bridge driver comprises a first input terminal, a second input terminal, a first output terminal and a second output terminal;
the first trigger terminal of the position detector and motor driver is connected to the second input terminal of the first half-bridge driver and connected to the first input terminal of the second half-bridge driver via the second phase inverter;
the second trigger terminal of the position detector and motor driver is connected to the first input terminal of the first half-bridge driver via the first phase inverter and connected to the second input terminal of the second half-bridge driver; and
the first output terminal and the second output terminal of the first half-bridge driver and the first output terminal and the second output terminal of the second half-bridge driver are respectively connected to first to fourth semiconductor switch transistors.

9. The electronic device according to claim 8 , wherein,
an output of the first output terminal of the first half-bridge driver follows a voltage inputted into the first input terminal of the first half-bridge driver, and an output of the second output terminal of the first half-bridge driver is inverse to a voltage inputted into the second input terminal of the first half-bridge driver; and
an output of the first output terminal of the second half-bridge driver follows an input of the first input terminal of the second half-bridge driver, and an output of the second output terminal of the second half-bridge driver is inverse to an input of the second input terminal of the second half-bridge driver.

10. A circuit, comprising a first operating component, a second operating component and a starting time control circuit, wherein,
a first starting voltage that enables starting of the first operating component is different from a second starting voltage that enables starting of the second operating component, and the starting time control circuit is configured to regulate a starting time of the first operating component to be synchronous with that of the second operating component,
wherein the starting time control circuit is connected in series with the first operating component, a series branch of the starting time control circuit and the first operating component is connected in parallel with the second operating component across a direct voltage, and the starting time control circuit is configured to adjust the direct voltage and provide the adjusted voltage for the first operating component, so that a voltage provided for the first operating component rises to the first starting voltage when a voltage provided for the second operating component rises to the second starting voltage.

11. The circuit according to claim 10 , wherein the starting time control circuit comprises a voltage division unit and a power-on unit, the voltage division unit has a turn-on voltage, and is turned on and clamped at the turn-on voltage in a case that a voltage applied to the voltage division unit is higher than or equal to the turn-on voltage, and the power-on unit is configured to generate a voltage and provide the voltage for the first operating component, after the voltage division unit is turned on, wherein a sum of the turn-on voltage of the voltage division unit and the first starting voltage is equal to the second starting voltage.

12. The circuit according to claim 11 , wherein the voltage division unit comprises a Zener diode, the power-on unit comprises a resistor, a cathode of the Zener diode is electrically connected to an anode output terminal, an anode of the Zener diode is electrically connected to the first operating component and electrically connected to a cathode output terminal of the rectifier via the resistor, and a breakdown volta

Assignees

• Johnson Electric Int Ag

Inventors

• Ma Hai Bo
• Lo Yuk Tung
• Ng Ka Lung
• Liang yu quan

Classifications

• H02P27/06

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

• B62D5/0406

  including housing for electronic control unit · CPC title

• H02K11/33 Primary

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• H02P6/20

  Arrangements for starting (H02P6/08 takes precedence) · CPC title

• H02P6/26 Primary

  Arrangements for controlling single phase motors · CPC title