CN105846729B - A kind of thyristor control circuit for measuring current control single-phase motor - Google Patents
A kind of thyristor control circuit for measuring current control single-phase motor Download PDFInfo
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- CN105846729B CN105846729B CN201610185914.9A CN201610185914A CN105846729B CN 105846729 B CN105846729 B CN 105846729B CN 201610185914 A CN201610185914 A CN 201610185914A CN 105846729 B CN105846729 B CN 105846729B
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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
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
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- Control Of Ac Motors In General (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
A kind of thyristor control circuit for measuring current control single-phase motor, connect the pole that one of circuit output end of single-phase motor is access to single phase poaer supply input terminal, the output terminal once Opposite direction connection diode, dropping resistor and including at least a zener diode branch and the parallel circuit of a filter condenser branch, be access to another pole of single phase poaer supply input terminal；High potential person connects the DC power supply terminal of electronic control circuit in two common node of parallel circuit, compared with the holding altogether that low potential person connects electronic control circuit；2nd main electrode of bidirectional thyristor is access to high potential common node through current sense resistor, and the 1st main electrode is access to the two of the circuit output end of connection single-phase motor；The tie point of the 2nd main electrode of bidirectional thyristor and current sense resistor is access to the signal input part of electronic control circuit；The control pole of thyristor is access to the control output end of electronic control circuit.The circuit is simple and cost is low, meets control performance requirement.
Description
Technical field
The present invention relates to a kind of thyristor electromotor control circuit, more particularly to a kind of measurement current control single-phase motor
Thyristor control circuit, in International Patent Classification (IPC), classification can belong to H02P7/622.
Background technology
It is with a long history with bidirectional thyristor control single-phase motor, in order to obtain excellent performance, also need to measure sometimes
The electric current of motor is controlled.However, the prior art control circuit is more complicated and cost is higher.
The content of the invention
The technical problems to be solved by the invention are to propose a kind of thyristor control for measuring current control single-phase motor
Circuit, its circuit compared with prior art is simple and cost is low, but meets control performance requirement, especially can continuously measure motor
Current instantaneous value be controlled.
The present invention solve the technical problem technical solution be：A kind of thyristor for measuring current control single-phase motor
Control circuit, including：Single phase poaer supply input terminal, connects the circuit output end of single-phase motor, bidirectional thyristor, has holding altogether
And DC power supply terminal, signal input part and the electronic control circuit of control output end of the opposite holding altogether；It is characterized in that：
--- one of circuit output end of the connection single-phase motor is access to a pole of the single phase poaer supply input terminal, should
Output terminal once Opposite direction connection diode, dropping resistor and including at least a zener diode branch and a filter condenser
The parallel circuit of branch, is access to another pole of single phase poaer supply input terminal；
--- high potential person connects the DC power supply terminal in two common node of parallel circuit, connects compared with low potential person
Connect the holding altogether；
--- the 2nd main electrode of the bidirectional thyristor is access to the high potential common node through current sense resistor, and the 1st
Main electrode is access to the two of the circuit output end of the connection single-phase motor；
--- the tie point of the 2nd main electrode of bidirectional thyristor and current sense resistor is access to the signal input part；
--- the control pole of the thyristor is access to the control output end.
In above-mentioned control circuit：
--- by Ohm's law, the voltage on current sense resistor is proportional to the electric current passed through；
--- by the 2nd law of kirchhoff, the tie point of the 2nd main electrode of bidirectional thyristor and current sense resistor is to common
The sum of the voltage at end, i.e., the voltage of holding altogether is superimposed with the voltage drop on current sense resistor equal to DC power supply terminal；
--- DC power supply terminal is zener diode and the constant voltage of filter condenser parallel circuit to holding altogether.
Therefore, the voltage on current sense resistor is clamped in the direct current power source voltage based on holding altogether, measures it institute
What is needed is dexterously combined and is solved with clamper problem commonly, i.e. the connection of the 2nd main electrode of bidirectional thyristor and current sense resistor
Point answers single-phase motor alternating current to electronic control circuit success the output phase and can be by usually such as a kind of electricity of microcontroller
Voltage measured by sub- control circuit.The design has the technical effect that：
--- compared using resistance decompression sampling and use traditional current transformer or the special core of newest current sensor
Piece, cost is relatively low and small volume；
--- save if microcontroller one kind electronic control circuit is in the commonly required pretreatment circuit of Measuring Alternating Current Signal, such as
Using clamp circuit of resistance, capacitance and diode combinations or operational amplifier etc., in addition to it can reduce cost, can also have to measurement
Response faster, improves reliability.
The further design of the circuit is the tie point warp of the 2nd main electrode of bidirectional thyristor and current sense resistor
One bleeder circuit is access to the signal input part.The bleeder circuit can make the signal input part obtain suitable signal width
Value.The lower resistance of a bleeder circuit appropriate capacitor preferably in parallel, to filter out interference.
Technical solutions and effects of the present invention will be further described with reference to attached drawing in a specific embodiment.
Brief description of the drawings
Fig. 1 is circuit diagram of the embodiment of the present invention.
Embodiment
Such as Fig. 1, the embodiment of the present invention is mainly included with measuring the thyristor control circuit of current control single-phase motor：
--- single phase poaer supply input terminal, its 2 pole is respectively AC_INPUT1 and AC_INPUT2；
--- the circuit output end of connection single-phase motor, its 2 pole is respectively MOTOR11 and MOTOR12；
--- bidirectional thyristor Q1；
--- microcontroller U1, its 8th foot are that lower margin VSS, the 1st foot are DC power supply foot VDD altogether, and the 2nd~7 foot is that numbering is
The I/O port of GP0~GP5.
In figure：
--- output terminals of the pole AC_INPUT1 of single phase poaer supply input terminal through Thermal Cutoffs F1 connection single-phase motors
One of MOTOR11, diode D1 of the tie point through Opposite direction connection, resistance R11 and R12, by zener diode DZ1, filtered electrical
The circuit that container C7 and C8, resistance R16 are formed in parallel, is access to another pole AC_INPUT2 of single phase poaer supply input terminal；
--- above-mentioned two common node of parallel circuit, is the common of the present embodiment circuit with dropping resistor R12 tie points person
GND is held, it connects the 8th feet of microcontroller U1 i.e. altogether lower margin VSS；1 feet of another common node connection microcontroller U1, that is, DC power supply
Foot VDD, the DC power supply terminal VCC as the present embodiment circuit.Due to the rectification of diode D1, the decompression of resistance R11 and R12,
The voltage stabilizing of zener diode DZ1 and the filtering of filter condenser C7, C8, above-mentioned holding altogether GND and DC power supply terminal VCC it
Between, formed with DC power supply terminal VCC to the direct current power source voltage that holding altogether GND (hereinafter referred to as " ") is positive 5V, for microcontroller
U1 works；
--- the 2nd main electrode (i.e. commonly called T2) of bidirectional thyristor Q1 is access to direct current through current sense resistor R22
Source VCC；1st main electrode (i.e. commonly called T1) is access to another output terminal MOTOR12 of above-mentioned connection single-phase motor；
--- the 2nd main electrode of bidirectional thyristor Q1 is connected monolithic with the tie point of current sense resistor R22 through resistance R24
The I/O port GP4 of machine U1.GP4 is at the same time through resistance R23 and capacitance C10 earths.Resistance R24 and R23 are constituted to the connection
The partial pressure reduction voltage circuit of the voltage sampling of point over the ground.Capacitance C10 plays Anti-Jamming；
--- the control pole of bidirectional thyristor Q1 is access to the I/O port GP2 of microcontroller through resistance R19；
--- an one of output terminals of the pole AC_INPUT1 through fuse F1 and single-phase motor for single phase poaer supply input terminal
The I/O port GP1, GP1 that the tie point of MOTOR11 is connected in series microcontroller U1 through resistance R9, R10 are grounded through resistance R18 at the same time, electricity
Resistance R24 and R23 constitutes the partial pressure of the voltage sampling to the power supply of the pole AC_INPUT1 from single phase poaer supply input terminal over the ground
Reduction voltage circuit.GP1 is grounded needed for composition Measuring Alternating Current Signal through resistance R17 connection DC power supply terminal VCC and through capacitance C9 at the same time
Upper clamper.Capacitance C9 plays Anti-Jamming；
--- through resistance at the A of another output terminal MOTOR12 of the 1st main electrode connection single-phase motor of bidirectional thyristor Q1
The I/O port GP0, GP0 that R20, R13 are connected in series microcontroller U1 are grounded through resistance R14 at the same time, and resistance R20 and R13 are constituted to coming
From the partial pressure reduction voltage circuit of the voltage sampling of the motor at A over the ground.GP0 at the same time through resistance R15 connection DC power supply terminal VCC with
The upper clamper formed needed for measurement alternating voltage is grounded through capacitance C6.Capacitance C6 plays Anti-Jamming；
--- an one of output terminals of the pole AC_INPUT1 through fuse F1 and single-phase motor for single phase poaer supply input terminal
The tie point of MOTOR11 is also connected in series the I/O port GP5 of microcontroller U1 through resistance R7, R8, therefore AC power is matched somebody with somebody after being depressured
The structure of I/O port is closed, zero cross signal synchronous with AC supply voltage needed for the Q1 triggerings of control bidirectional thyristor is provided to GP5.
GP5 is grounded through capacitor C5 at the same time, plays Anti-Jamming；
--- microcontroller U1 plug-ins, make the I/O port GP2 of microcontroller defeated according to the input of other I/O ports and plug-in
Go out trigger pulse, the conducting of control bidirectional thyristor Q1, so as to be connected to by the current control of the motor continuously measured
The startup and operating of the single-phase motor of circuit output end MOTOR11, MOTOR12.Plug-in flow instance refers to this Shen
The earlier application cn201510475220.4 to ask someone.
The circuit using resistance sampling measurement electric current have certain power attenuation and thus generate heat, should be noted by microcontroller IO
The performance of mouth selects alap sampling voltage, meets the needs of engineering survey precision.Within tens of watts of input power
Small size motor, suitably select sampling voltage, which can be limited within the 1% of motor input power.Motor
When rated voltage is higher, electric current is also smaller, which can be lower.
The precision of the circuit dc power voltage relies on zener diode, should be noted its precision of voltage regulation.Common voltage stabilizing two
Pole pipe can meet the needs of the engineering survey precision of the voltage clamping in general electric appliance on current sense resistor.
There can be the following design change fallen within the protection scope of the present invention：
--- Thermal Cutoffs F1 can be changed to protective device or circuitry instead arranged on external circuit, i.e. single phase poaer supply input terminal
A pole AC_INPUT1 be directly connected to one of output terminal of single-phase motor MOTOR11；
--- diode D1, dropping resistor R11 and R12 series sequence can be any；
--- the electronic control circuit being made of discrete component replaces microcontroller.
Claims (3)
1. a kind of thyristor control circuit for measuring current control single-phase motor, including：Single phase poaer supply input terminal, connection are single-phase
The circuit output end of motor, bidirectional thyristor, has DC power supply terminal, the signal input part of holding altogether and the opposite holding altogether
With the electronic control circuit of control output end；It is characterized in that：
One of circuit output end of the connection single-phase motor is access to a pole of the single phase poaer supply input terminal, the output terminal it
Once Opposite direction connection diode, dropping resistor and including at least a zener diode branch and a filter condenser branch and
Join circuit, be access to another pole of single phase poaer supply input terminal；
High potential person connects the DC power supply terminal in two common node of parallel circuit, is connected compared with low potential person described common
Ground terminal；
2nd main electrode of the bidirectional thyristor is access to the high potential common node through current sense resistor, and the 1st main electrode connects
Toward the two of the circuit output end of the connection single-phase motor；
The tie point of the 2nd main electrode of bidirectional thyristor and current sense resistor is access to the signal input part；
The control pole of the thyristor is access to the control output end.
2. according to thyristor control circuit described in claim 1, it is characterised in that：The 2nd main electrode of bidirectional thyristor and electricity
The tie point of stream detection resistance is access to the signal input part through a bleeder circuit.
3. according to thyristor control circuit described in claim 2, it is characterised in that：The electricity of lower resistor coupled in parallel one of the bleeder circuit
Container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610185914.9A CN105846729B (en) | 2016-03-28 | 2016-03-28 | A kind of thyristor control circuit for measuring current control single-phase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610185914.9A CN105846729B (en) | 2016-03-28 | 2016-03-28 | A kind of thyristor control circuit for measuring current control single-phase motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105846729A CN105846729A (en) | 2016-08-10 |
| CN105846729B true CN105846729B (en) | 2018-05-08 |
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|---|---|---|---|
| CN201610185914.9A Active CN105846729B (en) | 2016-03-28 | 2016-03-28 | A kind of thyristor control circuit for measuring current control single-phase motor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2496185Y (en) * | 2001-08-08 | 2002-06-19 | 张亚秀 | Energy saving means for motor |
| CN101971480A (en) * | 2008-03-12 | 2011-02-09 | 苏莫特有限责任公司 | Method and device for starting single-phase asynchronous motors |
| CN102025299A (en) * | 2009-09-14 | 2011-04-20 | 金荣俊 | Method for starting single-phase induction motor and corresponding electronic relay |
| CN202334405U (en) * | 2011-04-22 | 2012-07-11 | 上海施达电子科技有限公司 | Electronic circuit for starting of motor of minitype refrigeration compressor |
| CN103762928A (en) * | 2014-01-25 | 2014-04-30 | 济南诺辉节能技术开发有限公司 | Small single-phase motor load tracking energy-saving controller |
| CN204068778U (en) * | 2014-08-13 | 2014-12-31 | 广州森宝电器股份有限公司 | A kind of motor starter |
-
2016
- 2016-03-28 CN CN201610185914.9A patent/CN105846729B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2496185Y (en) * | 2001-08-08 | 2002-06-19 | 张亚秀 | Energy saving means for motor |
| CN101971480A (en) * | 2008-03-12 | 2011-02-09 | 苏莫特有限责任公司 | Method and device for starting single-phase asynchronous motors |
| CN102025299A (en) * | 2009-09-14 | 2011-04-20 | 金荣俊 | Method for starting single-phase induction motor and corresponding electronic relay |
| CN202334405U (en) * | 2011-04-22 | 2012-07-11 | 上海施达电子科技有限公司 | Electronic circuit for starting of motor of minitype refrigeration compressor |
| CN103762928A (en) * | 2014-01-25 | 2014-04-30 | 济南诺辉节能技术开发有限公司 | Small single-phase motor load tracking energy-saving controller |
| CN204068778U (en) * | 2014-08-13 | 2014-12-31 | 广州森宝电器股份有限公司 | A kind of motor starter |
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| Publication number | Publication date |
|---|---|
| CN105846729A (en) | 2016-08-10 |
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Address after: 529040 No. 336 Qinglan Road, Jiangmen High-tech Development Zone, Guangdong Province Patentee after: Hanyu Group Co., Ltd. Address before: 529040 No. 336 Qinglan Road, Jiangmen High-tech Development Zone, Guangdong Province Patentee before: Jiangmen Idear-hanyu Electrical Joint-stock Co., Ltd. |
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