CN105024617A - Motor control circuit - Google Patents
Motor control circuit Download PDFInfo
- Publication number
- CN105024617A CN105024617A CN201410153450.4A CN201410153450A CN105024617A CN 105024617 A CN105024617 A CN 105024617A CN 201410153450 A CN201410153450 A CN 201410153450A CN 105024617 A CN105024617 A CN 105024617A
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- China
- Prior art keywords
- circuit
- controlling motor
- control signal
- resistance
- pass switch
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Control Of Direct Current Motors (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention provides a motor control circuit. The motor control circuit comprises a capacitor, a resistor, a by-pass switch and a pre-device. The capacitor is electrically connected to a power supply terminal. The resistor is connected in series with the capacitor. The by-pass switch is connected in parallel to the resistor. The pre-device is used to provide at least one operation control signal to a motor and generate at least one delay control signal to the by-pass switch based on setting delay time so that the by-pass switch is conducted. The resistor is connected in series with the capacitor so that a current surge of a power supply conduction moment can be restrained. Because the by-pass switch is connected in parallel to the resistor, after a power supply is in a stable state, the by-pass switch is conducted so that the resistor is in a short circuit state, the capacitor is not influenced by the resistor, a filtering effect can be maintained and a noise is not generated.
Description
Technical field
The present invention, about a kind of circuit for controlling motor, especially a kind ofly suppresses the current spikes of power turn-on moment and can maintain the circuit for controlling motor of filter effect.
Background technology
When a system is in power turn-on (POWER ON) state, if directly the power end of a device (such as: motor) to be added the power end of this system, this device may produce big current surging to this system, if this current spikes is too high, intrasystem electronic component will be caused to bear and to damage.
Summary of the invention
The invention provides a kind of circuit for controlling motor, the current spikes of power turn-on moment can be suppressed, and can filter effect be maintained and can not noise be produced after power supply enters stable state.
The invention provides circuit for controlling motor.In one embodiment, this circuit for controlling motor comprises: an electric capacity, a resistance, bypass switch and a front device.This electric capacity is electrically connected to a power end.This resistance and this capacitances in series.This by-pass switch and this resistor coupled in parallel.This front device controls signal to a motor in order to provide at least one running, and sets time of delay according to one, produces at least one delayed control signal to this by-pass switch, makes this by-pass switch conducting, to make this resistive short.
Utilize this resistance and this capacitances in series, the current spikes of power turn-on moment can be suppressed.Utilize this by-pass switch and this resistor coupled in parallel, and after power supply stable state, make this by-pass switch conducting short circuit, make electric capacity can not be subject to the impact of this resistance, can filter effect be maintained and can not noise be produced.
Accompanying drawing explanation
Fig. 1 shows the block schematic diagram of an embodiment of circuit for controlling motor of the present invention;
Fig. 2 shows the circuit diagram of an embodiment of circuit for controlling motor of the present invention;
Fig. 3 A display does not have the voltage waveform view of the power turn-on moment of the circuit for controlling motor of resistance;
Fig. 3 B display does not have the current waveform schematic diagram of the power turn-on moment of the circuit for controlling motor of resistance;
Fig. 4 A display has the voltage waveform view of the power turn-on moment of the circuit for controlling motor of resistance;
Fig. 4 B display has the voltage waveform view of circuit for controlling motor in the power turn-on moment of T2 time point entry into service of resistance;
Fig. 4 C display has the current waveform schematic diagram of the power turn-on moment of the circuit for controlling motor of resistance;
Fig. 5 A display does not have the voltage waveform view during power supply stable state of the circuit for controlling motor of by-pass switch;
Fig. 5 B display does not have the current waveform schematic diagram during power supply stable state of the circuit for controlling motor of by-pass switch;
Fig. 6 A display has the voltage waveform view during power supply stable state of the circuit for controlling motor of by-pass switch.
Fig. 6 B display has the current waveform schematic diagram during power supply stable state of the circuit for controlling motor of by-pass switch.
Symbol description:
10 circuit for controlling motor
11 electric capacity
12 resistance
13 by-pass switches
14 front devices
15 motors
16 first rectifying devices
18 second rectifying devices
21 the 3rd rectifying devices
22 voltage stabilizing circuits
23 position elements
24 protective devices
131 drain electrodes
132 source electrodes
133 grids
161,162 rectifier diodes
163 commutation capacitors
164 dead resistances
171-174 diverter switch
181,182 rectifier diodes
S1-S4 operates control signal
S5, S6 delayed control signal
Embodiment
Fig. 1 shows the block schematic diagram of an embodiment of circuit for controlling motor of the present invention.Circuit for controlling motor 10 of the present invention comprises: electric capacity 11, one resistance 12, bypass switch 13 and a front device 14.This electric capacity 11 is electrically connected to a power end VCC.This resistance 12 is connected with this electric capacity 11.This by-pass switch 13 is in parallel with this resistance 12.This front device 14 in order to provide at least one running control signal S1-S4 to motor 15, and sets time of delay according to one, produces at least one delayed control signal S5, S6 to this by-pass switch 13, this by-pass switch 13 conducting is shorted to make this resistance 12.In an embodiment, this motor 15 can be a fan electromotor.
When the system (scheming not shown) of a user side is in power turn-on (POWER ON) state, if directly the power end VCC of this motor 15 to be added the power end (" heat is inserted " as described in industry) of this system, this electric capacity 11 will produce big current surging because of instantaneous short circuit, if this current spikes is too high, damage causing the intrasystem electronic component of user side to bear.Therefore, utilize this resistance 12 to connect with this electric capacity 11, to suppress current spikes, the intrasystem electronic component of protection user side.In one embodiment, the resistance value of this resistance is between 10 ohm to 100 ohm, to improve the effect suppressing current spikes.If the resistance value of this resistance is lower than a set point, then it suppresses the limited efficiency of current spikes.
But utilize this resistance 12 to connect with this electric capacity 11, to suppress the current spikes of power turn-on moment, but when power good state, this resistance 12 is deteriorated making the filter effect of this electric capacity 11, and then noise during generation stable state.Moreover, if the resistance value of this resistance 12 is too high, filter effect will be made more to reduce.Therefore, utilize this by-pass switch 13 in parallel with this resistance 12, and this front device 14 is after this setting time of delay (that is after power supply stable state), control makes this by-pass switch 13 conducting, therefore the path of electric current flows through the by-pass switch 13 of this electric capacity 11 and this conducting when power supply stable state, and do not flow through this resistance 12.Therefore, after this motor 15 quiet rum, electric capacity 11 can not be subject to the impact of this resistance 12, can maintain filter effect and can not produce noise.
Fig. 2 shows the circuit diagram of an embodiment of circuit for controlling motor of the present invention.Coordinate with reference to figure 1 and Fig. 2, this by-pass switch 13 is a pass-transistor, this pass-transistor comprises a drain electrode 131, one source pole 132 and a grid 133, this drain electrode 131 and this source electrode 132 in parallel with this resistance 12, this grid 133 receives at least one delayed control signal S5, S6.
Circuit for controlling motor 10 of the present invention separately comprises one first rectifying device 16, is connected between this front device 14 and this by-pass switch 13, in order to rectification at least one delayed control signal S5, S6.In one embodiment, this first rectifying device 16 comprises two rectifier diodes 161,162, commutation capacitor 163 and a dead resistance 164, two rectifier diodes 161,162 receive two delayed control signals S5, S6, this commutation capacitor 163 and this dead resistance 164 parallel connection, and one end of this commutation capacitor 163 and this dead resistance 164 is connected to the negative electrode of two rectifier diodes 161,162, the other end ground connection of this commutation capacitor 163 and this dead resistance 164.
Circuit for controlling motor 10 of the present invention separately comprises four diverter switches 171,172,173,174, connects this motor 15, four diverter switches 171,172,173,174 and receives running control signal S1-S4 respectively.In one embodiment, four diverter switches 171,172,173,174 can be switching transistor, and its grid is controlled by running control signal S1-S4, whether to control the conducting of switching transistor, and controls the running of this motor 15.
In one embodiment, delayed control signal S5, S6 are identical with operate control signal S1, S2 of part, that is this front device 14, after this setting time of delay, also produces operate control signal S1, S2, to control this motor 15.Therefore, delayed control signal S5, S6 can share running control signal S1, S2, whether to control the conducting of this by-pass switch 13.
Circuit for controlling motor 10 of the present invention separately comprises one second rectifying device 18, is connected between this electric capacity 11 and this power end VCC.This second rectifying device 18 comprises two rectifier diodes 181,182.Circuit for controlling motor 10 of the present invention separately comprises one the 3rd rectifying device 21 and a voltage stabilizing circuit 22, is connected between this front device 14 and this power end VCC, to provide stabilized power supply to this front device 14.In one embodiment, this front device 14 can be a pre-driver integrated circuit (IC) or microcontroller (MCU).Circuit for controlling motor 10 of the present invention separately comprises position element 23 and a protective device 24.Do not show the circuit element of the 3rd rectifying device 21, this voltage stabilizing circuit 22, this position element 23 and this protective device 24 in fig. 2.
Fig. 3 A display does not have the voltage waveform view of the power turn-on moment of the circuit for controlling motor of resistance.Fig. 3 B display does not have the current waveform schematic diagram of the power turn-on moment of the circuit for controlling motor of resistance.As shown in Fig. 3 A, 3B, when the circuit for controlling motor without resistance in the system of a user side in power turn-on (POWER ON) state time, directly the power end of the circuit for controlling motor without resistance is added the power end of this system, voltage waveform 31 is presented at T1 time point, adds the power end of this system.Current waveform 32 is presented at T1 time point and produces big current surging instantaneously, because not having resistance, can not suppress current spikes.If this current spikes is too high, damage causing the intrasystem electronic component of user side to bear.
Fig. 4 A display has the voltage waveform view of the power turn-on moment of the circuit for controlling motor of resistance.Fig. 4 B display has the voltage waveform view of circuit for controlling motor in the power turn-on moment of T2 time point entry into service of resistance.Fig. 4 C display has the current waveform schematic diagram of the power turn-on moment of the circuit for controlling motor of resistance.As shown in Fig. 4 A, 4B, 4C, when the circuit for controlling motor with resistance in the system of a user side in power turn-on (POWER ON) state time, directly the power end of the circuit for controlling motor with resistance is added the power end of this system, voltage waveform 41 is presented at T1 time point, adds the power end of this system.Because having resistance, the current spikes that current waveform 43 is presented at T1 time point is effectively suppressed.In addition, voltage waveform 42 is presented at T2 time point (that is time of delay is T2-T1), and motor starts to control running, and by-pass switch conducting.
Fig. 5 A display does not have the voltage waveform view during power supply stable state of the circuit for controlling motor of by-pass switch.Fig. 5 B display does not have the current waveform schematic diagram during power supply stable state of the circuit for controlling motor of by-pass switch.As shown in Fig. 5 A, 5B, if circuit for controlling motor does not have by-pass switch, this resistance is deteriorated making the filter effect of this electric capacity, and then noise during generation stable state.Voltage waveform 51 and current waveform 52 have sizable noise when being presented at power supply stable state.
Fig. 6 A display has the voltage waveform view during power supply stable state of the circuit for controlling motor of by-pass switch.Fig. 6 B display has the current waveform schematic diagram during power supply stable state of the circuit for controlling motor of by-pass switch.As shown in Fig. 6 A, 6B, when power supply stable state, this by-pass switch conducting, makes electric capacity can not be subject to the impact of this resistance, can maintain filter effect and can not produce noise.Voltage waveform 61 and current waveform 62 do not have noise when being presented at power supply stable state.
But above-described embodiment is only and principle of the present invention and effect thereof is described, and is not used to limit the present invention.Therefore, the personage practised in this technology modifies to above-described embodiment and changes still de-spirit of the present invention.Interest field of the present invention should listed by claims.
Claims (9)
1. a circuit for controlling motor, is characterized in that, described circuit for controlling motor comprises:
One electric capacity, is electrically connected to a power end;
One resistance, with this capacitances in series;
Bypass switch, with this resistor coupled in parallel; And
One front device, in order to provide at least one running to control signal to a motor, and sets time of delay according to one, produces at least one delayed control signal to this by-pass switch, make this by-pass switch conducting, to make this resistive short.
2. circuit for controlling motor as claimed in claim 1, it is characterized in that, this by-pass switch is a pass-transistor, and this pass-transistor comprises a drain electrode, one source pole and a grid, this drain electrode and this source electrode and this resistor coupled in parallel, this grid receives described at least one delayed control signal.
3. circuit for controlling motor as claimed in claim 1, it is characterized in that, described circuit for controlling motor separately comprises one first rectifying device, is connected between this front device and this by-pass switch, in order to delayed control signal at least one described in rectification.
4. circuit for controlling motor as claimed in claim 3, it is characterized in that, this first rectifying device comprises two rectifier diodes, a commutation capacitor and a dead resistance, described two rectifier diodes receive two delayed control signals, this commutation capacitor and the parallel connection of this dead resistance, and be connected to the negative electrode of described two rectifier diodes.
5. circuit for controlling motor as claimed in claim 1, it is characterized in that, the resistance value of this resistance is between 10 ohm to 100 ohm.
6. circuit for controlling motor as claimed in claim 1, it is characterized in that, described circuit for controlling motor separately comprises four diverter switches, and described four diverter switches connect this motor, and receives described at least one running control signal.
7. circuit for controlling motor as claimed in claim 1, it is characterized in that, described at least one delayed control signal is identical with the described at least one running control signal of part.
8. circuit for controlling motor as claimed in claim 1, it is characterized in that, described circuit for controlling motor separately comprises one second rectifying device, and it is connected between this electric capacity and this power end.
9. circuit for controlling motor as claimed in claim 1, it is characterized in that, described circuit for controlling motor separately comprises one the 3rd rectifying device and a voltage stabilizing circuit, and described 3rd rectifying device and described voltage stabilizing circuit are connected between this front device and this power end.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410153450.4A CN105024617A (en) | 2014-04-16 | 2014-04-16 | Motor control circuit |
| CN201910450700.3A CN110247614B (en) | 2014-04-16 | 2014-04-16 | Motor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410153450.4A CN105024617A (en) | 2014-04-16 | 2014-04-16 | Motor control circuit |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910450700.3A Division CN110247614B (en) | 2014-04-16 | 2014-04-16 | Motor control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105024617A true CN105024617A (en) | 2015-11-04 |
Family
ID=54414380
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410153450.4A Pending CN105024617A (en) | 2014-04-16 | 2014-04-16 | Motor control circuit |
| CN201910450700.3A Active CN110247614B (en) | 2014-04-16 | 2014-04-16 | Motor control circuit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910450700.3A Active CN110247614B (en) | 2014-04-16 | 2014-04-16 | Motor control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN105024617A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06245485A (en) * | 1993-02-18 | 1994-09-02 | Toshiba Corp | Inverter device |
| CN1431747A (en) * | 2002-01-08 | 2003-07-23 | 台达电子工业股份有限公司 | Circuit for restraining surge current |
| CN101064428A (en) * | 2006-04-28 | 2007-10-31 | 佛山市顺德区顺达电脑厂有限公司 | Burst current control circuit |
| CN103391042A (en) * | 2012-05-09 | 2013-11-13 | 台达电子工业股份有限公司 | Motor driving device capable of avoiding surge current |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08321896A (en) * | 1995-03-20 | 1996-12-03 | Fujitsu Ltd | Power receiving and feeding circuit and signal conversion circuit provided with the circuit |
| JP3760379B2 (en) * | 2000-12-28 | 2006-03-29 | 株式会社村田製作所 | Switching power supply |
| CN201414240Y (en) * | 2009-06-04 | 2010-02-24 | 佛山市伊戈尔电业制造股份有限公司 | Buffer current-limiting circuit for LED illuminating lamp direct-current power source |
| CN102761252B (en) * | 2012-07-25 | 2015-05-27 | 广州视源电子科技股份有限公司 | Switching power supply circuit with switching metal oxide semiconductor (MOS) tube |
-
2014
- 2014-04-16 CN CN201410153450.4A patent/CN105024617A/en active Pending
- 2014-04-16 CN CN201910450700.3A patent/CN110247614B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06245485A (en) * | 1993-02-18 | 1994-09-02 | Toshiba Corp | Inverter device |
| CN1431747A (en) * | 2002-01-08 | 2003-07-23 | 台达电子工业股份有限公司 | Circuit for restraining surge current |
| CN101064428A (en) * | 2006-04-28 | 2007-10-31 | 佛山市顺德区顺达电脑厂有限公司 | Burst current control circuit |
| CN103391042A (en) * | 2012-05-09 | 2013-11-13 | 台达电子工业股份有限公司 | Motor driving device capable of avoiding surge current |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110247614B (en) | 2021-05-11 |
| CN110247614A (en) | 2019-09-17 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151104 |