CN110146736A - Power supply zero-crossing detection circuit, motor control circuit, power supply zero-crossing detection method and motor driving method - Google Patents
Power supply zero-crossing detection circuit, motor control circuit, power supply zero-crossing detection method and motor driving method Download PDFInfo
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- CN110146736A CN110146736A CN201910501353.2A CN201910501353A CN110146736A CN 110146736 A CN110146736 A CN 110146736A CN 201910501353 A CN201910501353 A CN 201910501353A CN 110146736 A CN110146736 A CN 110146736A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/0004—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
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Abstract
The invention provides a power supply zero-crossing detection circuit, a motor control circuit, a power supply zero-crossing detection method and a motor driving method, wherein the circuit comprises the following components: the device comprises a zero line input end, a live wire input end, a unidirectional optocoupler, a switching circuit and a main control circuit, wherein the zero line input end and the live wire input end are respectively electrically connected with a primary of the unidirectional optocoupler; the unidirectional optical coupler controls the switch circuit to send a positive zero-crossing detection signal to the main control circuit in the positive period of the alternating current power supply, and the unidirectional optical coupler is cut off in the negative period of the alternating current power supply; and the main control circuit obtains a negative zero-crossing detection signal corresponding to the negative period of the alternating-current power supply according to the positive zero-crossing detection signal. The motor control circuit applies the power supply zero-crossing detection circuit. The power supply zero-crossing detection method is applied to the circuit. The motor driving method uses the power supply zero-crossing detection method. The invention can reduce cost and improve the sensitivity of zero-crossing detection.
Description
Technical field
The present invention relates to power detecting technical fields, specifically, being related to a kind of power zero-crossing detection circuit, further relate to apply
The circuit for controlling motor of the power zero-crossing detection circuit further relates to apply the power supply zero passage on the power zero-crossing detection circuit to examine
Survey method further relates to apply the driving method on circuit for controlling motor.
Background technique
In electric equipment products, many load controls are required using power supply crossover point signal is arrived, as control load ginseng
It examines according to point, such as: control exchange PG motor speed reliability, it is necessary to obtain power supply crossover point signal, in time to work as
Leading zero point moment is as adjusting revolving speed reference control point.
Detection crossover point signal is generally handled by dedicated zero cross detection circuit, and PG motor is exchange heavy-current control load,
Using the motor control signal that zero crossing is reference as weak electric signal, and power supply waveform is AC sine wave, in a cycle
2 zero cross signal points are generated, for example, supply and AC power supply wave shape is as shown in Figure 1, power supply is detected by zero cross detection circuit
Afterwards, the zero cross signal obtained is as shown in Figure 2.
Because a cycle of AC power source has a generating positive and negative voltage, 2 zero cross signal points are generated in a cycle, in detection circuit
Optocoupler is needed using bidirectionally conductive optocoupler, i.e. power supply generating positive and negative voltage can be connected, and generates zero cross signal reference point.But bi-directional light
Coupling higher cost is higher so as to cause the production cost of electric equipment products.
Summary of the invention
The first object of the present invention be to provide it is a kind of reduce cost, improve the power zero-crossing detection circuit of detection sensitivity.
The second object of the present invention be to provide it is a kind of reduce cost, improve the sensitivity and control accuracy of zero passage detection
Circuit for controlling motor.
The third object of the present invention is to provide a kind of power supply zero passage detection method for improving detection sensitivity.
The fourth object of the present invention be to provide it is a kind of improve zero passage detection sensitivity and drive control accuracy electricity
Machine driving method.
In order to realize above-mentioned first purpose, power zero-crossing detection circuit provided by the invention includes zero curve input terminal, firewire
Input terminal, unidirectional optocoupler, switching circuit and governor circuit, firewire input terminal are electrically connected with the primary first end of unidirectional optocoupler,
Zero curve input terminal is electrically connected with the primary second end of unidirectional optocoupler, and the secondary of unidirectional optocoupler and the input terminal of switching circuit are electrically connected
It connects, the output end of switching circuit is electrically connected with governor circuit；Unidirectional optocoupler the positive period control switch circuit of AC power source to
Governor circuit sends positive going zeror crossing and detects signal, and unidirectional optocoupler ends in the AC power source negative sense period；Governor circuit is according to forward direction
Zero passage detection signal obtains AC power source negative sense period corresponding negative sense zero passage detection signal.
By above scheme as it can be seen that power zero-crossing detection circuit of the invention passes through using unidirectional optocoupler in AC power source forward direction
Period control switch circuit sends positive going zeror crossing to governor circuit and detects signal, and is detected by governor circuit according to positive going zeror crossing
Signal obtains AC power source negative sense period corresponding negative sense zero passage detection signal, to realize positive by only detection AC power source
The positive going zeror crossing detection signal in period can be obtained the zero passage detection signal in power supply whole cycle, reduce whole zero passage detection letters
Number by hardware circuit generate caused by delay, to improve the sensitivity of zero passage detection.Meanwhile it being replaced using unidirectional optocoupler
Existing two-way optocoupler, can relative reduction cost as zero passage detection element.
In further embodiment, switching circuit includes switching transistor, the control electrode of switching transistor and unidirectional optocoupler
Secondary electrical connection, the output stage of switching transistor are electrically connected with governor circuit.
It can be seen that due to switching transistor sensitive degree of reaction with higher, switching circuit is using switch crystal
Pipe carries out the transmission of positive going zeror crossing detection signal, and the sensitivity of detection can be improved.
In further embodiment, power zero-crossing detection circuit further includes a diode, the anode and Unidirectional light of diode
The primary second end of coupling is electrically connected, and the cathode of diode is electrically connected with the primary first end of unidirectional optocoupler.
It can be seen that since unidirectional optocoupler belongs to one way conducting device, AC power source can only make list in the positive period
It is connected to optocoupler, in order to ensure detection circuit can be connected at the AC power source negative sense period, setting one-way conduction can be passed through
Diode, be set to unidirectional optocoupler conducting direction on the contrary, so that it is guaranteed that detection circuit in the AC power source positive period and
The negative sense period is both turned on.
In further embodiment, power zero-crossing detection circuit further includes the first reduction voltage circuit, and firewire input terminal passes through first
Reduction voltage circuit is electrically connected with the primary first end of unidirectional optocoupler.
In further embodiment, power zero-crossing detection circuit further includes the second reduction voltage circuit, and zero curve input terminal passes through second
Reduction voltage circuit is electrically connected with the primary second end of unidirectional optocoupler.
It can be seen that in order to avoid reducing the risk that unidirectional optocoupler is burned out, the first drop of power zero-crossing detection circuit setting
Volt circuit and the second reduction voltage circuit ensure unidirectional optocoupler to reduce the voltage between AC power source and the primary of unidirectional optocoupler
Safe handling.
In order to realize above-mentioned second purpose, circuit for controlling motor provided by the invention includes power zero-crossing detection circuit and electricity
Drive circuit, power zero-crossing detection circuit apply above-mentioned power zero-crossing detection circuit；Motor-drive circuit and governor circuit
Electrical connection, governor circuit detect signal or negative sense zero passage detection signal according to positive going zeror crossing and send driving control to motor-drive circuit
Signal processed.
Unidirectional optocoupler is utilized to exist as it can be seen that the power zero-crossing detection circuit of circuit for controlling motor of the present invention passes through by above scheme
AC power source forward direction period control switch circuit to governor circuit send positive going zeror crossing detect signal, and by governor circuit according to
Positive going zeror crossing detects signal and obtains AC power source negative sense period corresponding negative sense zero passage detection signal, to realize by only detecting
The positive going zeror crossing detection signal in AC power source forward direction period can be obtained the zero passage detection signal in power supply whole cycle, reduce complete
Portion's zero passage detection signal is generated caused delay by hardware circuit, to improve the sensitivity of zero passage detection, and then is improved
The accuracy of drive and control of electric machine.Meanwhile replacing existing two-way optocoupler as zero passage detection element using unidirectional optocoupler, it can phase
To reducing cost.
In order to realize that above-mentioned third purpose, power supply zero passage detection method provided by the invention include: to judge whether to get
AC power source forward direction period corresponding zero passage detection signal, if so, detecting signal according to positive going zeror crossing obtains AC power source negative sense
Period corresponding negative sense zero passage detection signal.
By above scheme as it can be seen that power supply zero passage detection method of the present invention is by obtaining AC power source positive period corresponding mistake
Zero detection signal, and signal is detected according to positive going zeror crossing and obtains AC power source negative sense period corresponding negative sense zero passage detection signal,
To realize that detecting signal by the positive going zeror crossing for only detecting the AC power source positive period can be obtained in power supply whole cycle
Zero passage detection signal reduces the delay caused by whole zero passage detection signals are generated by hardware circuit, to improve zero passage inspection
The sensitivity of survey.
In further embodiment, signal is detected according to positive going zeror crossing and obtains AC power source negative sense period corresponding negative sense zero passage
The step of detecting signal comprises determining that the power cycle of AC power source；If current time distance gets positive going zeror crossing detection letter
Number at the time of when reaching power cycle half duration, generate AC power source negative sense period corresponding negative sense zero passage detection signal.
It can be seen that after obtaining the adjacent positive going zeror crossing twice detection signal interval of AC power source, it is determined that hand over
The power cycle in galvanic electricity source, and start timing in AC power source positive zero crossing, when timing time reaches power cycle half
After duration, negative sense zero passage detection signal is generated, zero passage detection signal can be adaptively obtained according to different power cycles, improves electricity
The application range on road.
In order to realize above-mentioned 4th purpose, driving method provided by the invention includes: to judge whether to get exchange
Power supply forward direction period corresponding zero passage detection signal, if so, detecting signal according to positive going zeror crossing obtains the AC power source negative sense period
Corresponding negative sense zero passage detection signal；Signal or negative sense zero passage detection signal is detected according to positive going zeror crossing to send out to motor-drive circuit
Send driving control signal.
By above scheme as it can be seen that driving method of the present invention is by obtaining the corresponding zero passage inspection of AC power source positive period
Signal is surveyed, and signal is detected according to positive going zeror crossing and obtains AC power source negative sense period corresponding negative sense zero passage detection signal, thus
Realize that detecting signal by the positive going zeror crossing for only detecting the AC power source positive period can be obtained the zero passage in power supply whole cycle
Signal is detected, the delay caused by whole zero passage detection signals are generated by hardware circuit is reduced, to improve zero passage detection
Sensitivity, and then improve the accuracy of drive and control of electric machine.
Detailed description of the invention
Fig. 1 is the schematic diagram of supply and AC power supply wave shape.
Fig. 2 is the schematic diagram for the zero cross signal that AC power source obtains after the detection of existing zero cross detection circuit.
Fig. 3 is the circuit diagram of circuit for controlling motor embodiment of the present invention.
Fig. 4 is the mistake that AC power source obtains after zero cross detection circuit detects in circuit for controlling motor embodiment of the present invention
The schematic diagram of zero-signal.
Fig. 5 is the flow chart of power supply zero passage detection embodiment of the method for the present invention.
The invention will be further described with reference to the accompanying drawings and embodiments.
Specific embodiment
Power zero-crossing detection circuit embodiment:
As shown in figure 3, power zero-crossing detection circuit 1 of the invention includes zero curve input terminal N, firewire input terminal L, Unidirectional light
Coupling U1, switching circuit 3 and governor circuit 4, firewire input terminal L are electrically connected with the primary first end of unidirectional optocoupler U1, and zero curve is defeated
Enter to hold N and the primary second end of unidirectional optocoupler U1 to be electrically connected, the secondary of unidirectional optocoupler U1 and the input terminal of switching circuit 3 are electrically connected
It connects, the output end of switching circuit 3 is electrically connected with governor circuit 4.Unidirectional optocoupler U1 is in the positive period control switch electricity of AC power source
Road 3 sends positive going zeror crossing to governor circuit 4 and detects signal, and unidirectional optocoupler U1 ends in the AC power source negative sense period.Governor circuit 4
Signal, which is detected, according to positive going zeror crossing obtains AC power source negative sense period corresponding negative sense zero passage detection signal.
Power zero-crossing detection circuit 1 further includes a diode D1, the primary of the anode and unidirectional optocoupler U1 of diode D1
Second end electrical connection, the cathode of diode D1 are electrically connected with the primary first end of unidirectional optocoupler U1.
RC filter circuit is also parallel between the primary first end of unidirectional optocoupler U1 and the primary second end of unidirectional optocoupler U1
7, RC filter circuits 7 include resistance R7 and capacitor C1, and resistance R7 and capacitor C1 are connected in parallel.
Power zero-crossing detection circuit 1 further includes the first reduction voltage circuit 5 and the second reduction voltage circuit 6, and firewire input terminal L passes through the
One reduction voltage circuit 5 is electrically connected with the primary first end of unidirectional optocoupler U1.Zero curve input terminal N is by the second reduction voltage circuit 6 and unidirectionally
The primary second end of optocoupler U1 is electrically connected.First reduction voltage circuit 5 includes resistance R1, resistance R2 and resistance R3, resistance R1, resistance R2
It is connected in parallel with resistance R3.Second reduction voltage circuit 6 includes resistance R4, resistance R5 and resistance R6, resistance R4, resistance R5 and resistance R6
It is connected in parallel.
Switching circuit 3 includes switching transistor Q1, and the control electrode of switching transistor Q1 and the secondary of unidirectional optocoupler U1 are electrically connected
It connects, the output stage of switching transistor Q1 is electrically connected with governor circuit 4.Switching transistor Q1 can be triode, field-effect tube or
Metal-oxide-semiconductor can be set as needed.In the present embodiment, switching transistor Q1 is NPN type triode, the collector of NPN type triode
It is electrically connected respectively with DC power supply and governor circuit 4, the secondary second end of unidirectional optocoupler U1 is electrically connected with DC power supply, NPN type
The base stage of triode is electrically connected with the secondary first end of unidirectional optocoupler U1, the emitter ground connection of NPN type triode.
At the AC power source positive period, voltage is inputted after the decompression of the first reduction voltage circuit 5 unidirectional by firewire input terminal L
Optocoupler U1 primary side returns to zero curve input terminal N using the second reduction voltage circuit 6 and constitutes circuit.At this point, unidirectional optocoupler U1 primary two
End forms conducting pressure difference, unidirectional optocoupler U1 conducting, and switching transistor Q1 forms emitter positively biased, the reverse-biased turn-on condition of collector,
Switching transistor Q1 conducting, DC power supply+5V constitute circuit by resistance R10 and switching transistor Q1, and governor circuit 4 is examined at this time
Measure low level.It is gradually reduced in AC power source forward voltage, when dropping to less than unidirectional optocoupler U1 primary side conducting voltage,
Unidirectional U1 grade of optocoupler is ended, and governor circuit 4 detects high level, that is, detects rising edge level change from low to high,
Governor circuit 4 thinks there is the generation of power supply zero point at this time.At the AC power source negative sense period, voltage is by zero curve input terminal N by the
The decompression of two reduction voltage circuits 6 returns to firewire input terminal L using the first reduction voltage circuit 5 and constitutes circuit by diode D1, similarly,
Unidirectional optocoupler U1 cut-off, governor circuit 4 are consistently detected high level at this time.Therefore, the AC power source in the present embodiment, in Fig. 1
After unidirectional optocoupler U1, the zero cross signal that governor circuit 4 detects is as shown in Figure 4.
Power supply zero passage detection embodiment of the method:
Power supply zero passage detection method of the invention is to apply answering in above-mentioned power zero-crossing detection circuit 1 governor circuit 4
With program, zero passage detection is carried out for realizing to power supply.
As shown in figure 5, when being worked step S1 is first carried out, judgement is in power supply zero passage detection method of the invention
It is no to get AC power source positive period corresponding zero passage detection signal.Judging whether to get the AC power source positive period pair
When the zero passage detection signal answered, whether governor circuit 4 by low level can jump to high level to voltage by judge to obtain, if
It is, then it is assumed that get AC power source positive period corresponding zero passage detection signal.For example, with reference to Fig. 4, at t1, t3 moment, electricity
Pressure jumps to high level by low level, therefore, thinks to get the corresponding zero passage inspection of AC power source positive period at t1, t3 moment
Survey signal.
After obtaining AC power source positive period corresponding zero passage detection signal, step S2 is executed, is examined according to positive going zeror crossing
It surveys signal and obtains AC power source negative sense period corresponding negative sense zero passage detection signal.In order to reduce whole zero passage detection signals by
Hardware circuit generates caused delay, after obtaining AC power source positive period corresponding zero passage detection signal, according to forward direction
Zero passage detection signal obtains negative sense period corresponding negative sense zero passage detection signal under the same power cycle of AC power source.
The step of negative sense zero passage detection signal corresponding according to the positive going zeror crossing detection signal acquisition AC power source negative sense period
Comprise determining that the power cycle of AC power source；If current time distance reaches electricity at the time of getting positive going zeror crossing detection signal
When source period half duration, AC power source negative sense period corresponding negative sense zero passage detection signal is generated.
It is therefore, positive obtaining AC power source in order to adaptively obtain zero passage detection signal according to different power cycles
After period corresponding zero passage detection signal, the power cycle of current AC power source to be detected need to be confirmed.The power supply of AC power source
Period can detect that the AC power source adjacent twice positive period corresponds to the interval time of zero passage detection signal by governor circuit 4
It obtains, is a power cycle for example, with reference to 4, the t1 moment to t3 moment.Getting AC power source positive period corresponding mistake
At the time of zero detection signal, then timing is opened.If current time distance reaches electricity at the time of getting positive going zeror crossing detection signal
When source period half duration, AC power source negative sense period corresponding negative sense zero passage detection signal is generated, to obtain one completely
All zero cross signals of power cycle.
Circuit for controlling motor embodiment:
As shown in figure 3, circuit for controlling motor of the invention includes power zero-crossing detection circuit 1 and motor-drive circuit 2.Electricity
Source zero cross detection circuit is using the power zero-crossing detection circuit 1 in above-mentioned power zero-crossing detection circuit embodiment.Motor driven electricity
Road 2 is electrically connected with the governor circuit 4, and the governor circuit 4 detects signal or the negative sense zero passage according to the positive going zeror crossing
It detects signal and sends driving control signal to the motor-drive circuit 2.Motor-drive circuit 2 is using known motor driven electricity
Road, details are not described herein.
Driving method embodiment:
Driving method of the invention is applied in above-mentioned circuit for controlling motor.
Driving method of the invention is real first with above-mentioned power supply zero passage detection method when driving to motor
The power supply zero passage detection method in example is applied, AC power source positive period corresponding zero passage detection signal is obtained and AC power source is negative
To period corresponding negative sense zero passage detection signal.Signal or negative sense zero passage detection signal is detected further according to positive going zeror crossing to drive to motor
Dynamic circuit sends driving control signal.Governor circuit 4 detects signal or negative sense zero passage detection signal to motor according to positive going zeror crossing
Driving circuit sends driving control signal and is well known to those skilled in the art technology, and details are not described herein.
It can be seen from the above, power zero-crossing detection circuit of the invention passed through using unidirectional optocoupler in the AC power source positive period
Control switch circuit sends positive going zeror crossing to governor circuit and detects signal, and detects signal according to positive going zeror crossing by governor circuit
AC power source negative sense period corresponding negative sense zero passage detection signal is obtained, to realize through the only detection AC power source positive period
Positive going zeror crossing detection signal can be obtained the zero passage detection signal in power supply whole cycle, it is equal to reduce whole zero passage detection signals
Delay caused by being generated by hardware circuit, to improve the sensitivity of zero passage detection.Meanwhile it being replaced using unidirectional optocoupler existing
Two-way optocoupler as zero passage detection element, can relative reduction cost.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept invented is not limited thereto,
All insubstantial modifications made using this design to the present invention, are also fallen within the scope of protection of the present invention.
Claims (10)
1. a kind of power zero-crossing detection circuit, it is characterised in that: including
Zero curve input terminal, firewire input terminal, unidirectional optocoupler, switching circuit and governor circuit, the firewire input terminal with it is described
The primary first end electrical connection of unidirectional optocoupler, the zero curve input terminal are electrically connected with the primary second end of the unidirectional optocoupler, institute
The secondary for stating unidirectional optocoupler is electrically connected with the input terminal of the switching circuit, the output end of the switching circuit and master control electricity
Road electrical connection；
The unidirectional optocoupler controls the switching circuit in the AC power source positive period and sends positive going zeror crossing to the governor circuit
Signal is detected, the unidirectional optocoupler ends in the AC power source negative sense period；
The governor circuit detects signal according to the positive going zeror crossing and obtains the AC power source negative sense period corresponding negative sense mistake
Zero detection signal.
2. power zero-crossing detection circuit according to claim 1, it is characterised in that:
The switching circuit includes switching transistor, and the control electrode of the switching transistor and the secondary of the unidirectional optocoupler are electrically connected
It connects, the output stage of the switching transistor is electrically connected with the governor circuit.
3. power zero-crossing detection circuit according to claim 1 or 2, it is characterised in that:
The power zero-crossing detection circuit further includes a diode, the primary of the anode and the unidirectional optocoupler of the diode
Second end electrical connection, the cathode of the diode are electrically connected with the primary first end of the unidirectional optocoupler.
4. power zero-crossing detection circuit according to claim 1 or 2, it is characterised in that:
The power zero-crossing detection circuit further includes the first reduction voltage circuit, and the firewire input terminal passes through first reduction voltage circuit
It is electrically connected with the primary first end of the unidirectional optocoupler.
5. power zero-crossing detection circuit according to claim 4, it is characterised in that:
The power zero-crossing detection circuit further includes the second reduction voltage circuit, and the zero curve input terminal passes through second reduction voltage circuit
It is electrically connected with the primary second end of the unidirectional optocoupler.
6. circuit for controlling motor, including power zero-crossing detection circuit and motor-drive circuit, it is characterised in that:
The described in any item power zero-crossing detection circuits of the power zero-crossing detection circuit application the claims 1 to 5；
The motor-drive circuit is electrically connected with the governor circuit, and the governor circuit detects signal according to the positive going zeror crossing
Or the negative sense zero passage detection signal sends driving control signal to the motor-drive circuit.
7. a kind of power supply zero passage detection method is applied to power zero-crossing detection circuit described in any one of claim 1 to 5,
It is characterized in that: the described method includes:
Judge whether to get the AC power source positive period corresponding zero passage detection signal, if so, according to the positive mistake
Zero detection signal obtains the AC power source negative sense period corresponding negative sense zero passage detection signal.
8. power supply zero passage detection method according to claim 7, it is characterised in that:
It is described that the signal acquisition AC power source negative sense period corresponding negative sense zero passage detection letter is detected according to the positive going zeror crossing
Number the step of include:
Determine the power cycle of the AC power source；
If current time distance reaches the power cycle half duration at the time of getting the positive going zeror crossing detection signal,
Generate the AC power source negative sense period corresponding negative sense zero passage detection signal.
9. a kind of driving method is applied to motor as claimed in claim 6, which is characterized in that the described method includes:
Judge whether to get the AC power source positive period corresponding zero passage detection signal, if so, according to the positive mistake
Zero detection signal obtains the AC power source negative sense period corresponding negative sense zero passage detection signal；
Signal or the negative sense zero passage detection signal, which are detected, according to the positive going zeror crossing sends driving to the motor-drive circuit
Control signal.
10. driving method according to claim 9, it is characterised in that:
It is described that the signal acquisition AC power source negative sense period corresponding negative sense zero passage detection letter is detected according to the positive going zeror crossing
Number the step of include:
Determine the power cycle of the AC power source；
If current time distance reaches the power cycle half duration at the time of getting the positive going zeror crossing detection signal,
Generate the AC power source negative sense period corresponding negative sense zero passage detection signal.
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| CN201910501353.2A CN110146736A (en) | 2019-06-11 | 2019-06-11 | Power supply zero-crossing detection circuit, motor control circuit, power supply zero-crossing detection method and motor driving method |
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| CN201910501353.2A CN110146736A (en) | 2019-06-11 | 2019-06-11 | Power supply zero-crossing detection circuit, motor control circuit, power supply zero-crossing detection method and motor driving method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116449122A (en) * | 2023-06-16 | 2023-07-18 | 创辉科技有限公司 | Fault detection circuit of power supply system |
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| CN101598749A (en) * | 2009-06-26 | 2009-12-09 | 中兴通讯股份有限公司 | Three-phase does not have the center line alternating current zero crossing detection device |
| CN102012455A (en) * | 2010-11-03 | 2011-04-13 | 苏州合欣美电子科技有限公司 | Zero-crossing detection circuit |
| CN102890184A (en) * | 2012-10-25 | 2013-01-23 | 德讯科技股份有限公司 | Zero-crossing detection circuit based on optocoupler |
| CN103424606A (en) * | 2013-07-26 | 2013-12-04 | 珠海钱龙载波***有限公司 | Frequency-adaptive low-voltage power carrier communication zero-crossing detection circuit |
| CN104579020A (en) * | 2013-10-25 | 2015-04-29 | 广东美的制冷设备有限公司 | Startup control method and startup control system for PG speed regulating motor |
| CN107831357A (en) * | 2017-11-27 | 2018-03-23 | 深圳市锐钜科技有限公司 | Single-phase alternating current zero cross detection circuit and detection method based on light-coupled isolation |
| CN207516436U (en) * | 2017-12-12 | 2018-06-19 | 四川长虹电器股份有限公司 | A kind of zero cross detection circuit applied to Intelligent toilet cover |
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| CN116449122A (en) * | 2023-06-16 | 2023-07-18 | 创辉科技有限公司 | Fault detection circuit of power supply system |
| CN116449122B (en) * | 2023-06-16 | 2023-08-18 | 创辉科技有限公司 | Fault detection circuit of power supply system |
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Application publication date: 20190820 |