CN115483916B - Phase-shifting trigger controller with power regulation and power limitation - Google Patents
Phase-shifting trigger controller with power regulation and power limitation Download PDFInfo
- Publication number
- CN115483916B CN115483916B CN202211418292.1A CN202211418292A CN115483916B CN 115483916 B CN115483916 B CN 115483916B CN 202211418292 A CN202211418292 A CN 202211418292A CN 115483916 B CN115483916 B CN 115483916B
- Authority
- CN
- China
- Prior art keywords
- circuit
- phase
- resistor
- power
- silicon controlled
- Prior art date
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0824—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in thyristor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/16—Modifications for eliminating interference voltages or currents
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
- H03K17/722—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0009—AC switches, i.e. delivering AC power to a load
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0027—Measuring means of, e.g. currents through or voltages across the switch
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0081—Power supply means, e.g. to the switch driver
Landscapes
- Power Conversion In General (AREA)
Abstract
The invention discloses a phase-shifting trigger controller with power regulation and power limitation, which comprises a processor, an analog quantity input circuit, a single-phase line silicon controlled trigger unit, a feedback current input circuit, an alarm circuit and a power limitation circuit, wherein the single-phase line silicon controlled trigger unit comprises a silicon controlled trigger circuit and a phase failure acquisition circuit, the analog quantity input circuit, the feedback current input circuit, the alarm circuit, the silicon controlled trigger circuit of the single-phase line silicon controlled trigger unit and the phase failure acquisition circuit are respectively connected with the processor, and the silicon controlled trigger circuit of the single-phase line silicon controlled trigger unit is connected with the phase failure acquisition circuit. The invention can effectively avoid the damage of the load or the line caused by overlarge current on the load loop through the double arrangement of the power limitation of the power limiting circuit and the power regulation of the feedback current input circuit, and is suitable for the control of various inductive loads.
Description
Technical Field
The invention relates to the field of phase-shift triggers, in particular to a phase-shift trigger controller with power regulation and power limitation.
Background
The phase-shift trigger is a control mode of the controllable silicon, and controls the conduction energy of the controllable silicon by controlling the conduction angle of the controllable silicon so as to change the power applied to a load; specifically, the phase-shifting trigger controller is connected with analog signals such as 0-20mA, 4-20mA, 0-5V and 1-5V signals, outputs PWM waveform signals to a controlled silicon on an alternating current loop according to the size of the input analog signals, controls the conduction angle of the controlled silicon and changes the power loaded on a load. When the existing phase-shifting trigger controller is applied to loop control of variable-resistance loads such as heating rods, motors and the like, voltage curve fluctuation on a loop is small, output voltage and current are relatively smooth, and the applicability of the existing phase-shifting trigger controller is relatively high. However, in the loop control of the inductive load such as a silicon molybdenum rod, graphite, a silicon carbon rod and the like, because the resistance value of the inductive load changes with the temperature or becomes larger due to aging, the larger the resistance value is, the larger the current in the loop is, and in order to avoid that the loop current is too large along with the increase of the load resistance, and the load is burnt out, the current of the load loop is often required to be controlled; in a few existing phase-shift trigger controllers, feedback loop current collection is designed, if the feedback loop current is too large, prompting such as alarming is carried out or output control is directly interrupted, however, no matter reprocessing after alarming or readjustment after interruption of output control is carried out, the influence of overlarge loop current on the production process is already generated, production loss is already caused, the feedback response of the loop current is only to interrupt subsequent influence in time, and the influence is reduced.
Disclosure of Invention
The invention aims to provide a phase-shifting trigger controller with power regulation and power limitation.
The technical scheme for realizing the purpose of the invention is as follows: a phase-shift trigger controller with power regulation and power limitation comprises a processor, an analog quantity input circuit, a single-phase line silicon controlled trigger unit, a feedback current input circuit, an alarm circuit and a power limitation circuit, wherein the single-phase line silicon controlled trigger unit comprises a silicon controlled trigger circuit and a phase-lack acquisition circuit; wherein:
the analog quantity input circuit comprises a voltage signal input end IN0, a current signal input end IN1, a first sampling filter circuit, a jumper wire cap J1, a plurality of resistors and an analog quantity voltage output end Vin1 connected with the processor, one pin of the jumper wire cap J1 is grounded, a resistor R8 is connected between the other pin of the jumper wire cap J1 and the voltage signal input end IN0 IN series, the first sampling filter circuit is connected with a resistor R11 IN parallel, the parallel circuit of the first sampling filter circuit and the resistor R11 and a resistor R10 are connected between one end of the resistor R8 connected with the voltage signal input end IN0 and the ground IN series, the resistor R11 is connected with the ground, and the output end of the first sampling filter circuit is connected with the analog quantity voltage output end Vin 1;
the power limiting circuit consists of a power limiting potentiometer RP, a current signal input end IN1 IN the analog input circuit is connected with a movable end of the power limiting potentiometer RP, and one end of a resistor R8 connected with a voltage signal input end IN0 is connected with a fixed end of the power limiting potentiometer RP;
and the open-phase acquisition circuit is used for acquiring a trigger state signal of the silicon controlled trigger circuit.
Further, silicon controlled rectifier trigger circuit includes optoelectronic coupling unit, bidirectional thyristor B1, a plurality of resistance and outside silicon controlled rectifier link, the positive terminal and the power VCC1 of the luminous side of optoelectronic coupling unit are connected, the negative pole end series resistance R44 of the luminous side of optoelectronic coupling unit after with the PWM delivery outlet of treater is connected, one end is connected with bidirectional thyristor B1's first main terminal in the both ends of optoelectronic coupling unit light sense side, is connected with bidirectional thyristor B1's control pole behind the other end series resistance R47, draws together as outside silicon controlled rectifier link with bidirectional thyristor B1's first main terminal behind bidirectional thyristor B1's the second main terminal series resistance R53.
Further, the photoelectric coupling unit comprises a first bidirectional thyristor output optical coupler U8 and a second bidirectional thyristor output optical coupler U9 which are connected in series.
Furthermore, the open-PHASE acquisition circuit comprises a bridge rectifier circuit D3, an optocoupler U4, an NPN triode Q1 and a plurality of resistors, wherein the input end of the bridge rectifier circuit D3 is connected with the external silicon controlled rectifier connecting end after being connected with a resistor R26 in series, the output end of the bridge rectifier circuit D3 is connected with the light emitting side of the optocoupler U4 to form a loop, a resistor R19 is connected between the positive electrode of the light sensing side of the optocoupler U4 and a power VCC2 in series, the negative electrode of the light sensing side of the optocoupler U4 is connected with a resistor R20 in series between the ground, the negative electrode of the light sensing side of the optocoupler U4 is further connected with a base electrode of an NPN triode Q1, a collector electrode of the NPN triode Q1 is connected with a resistor R16 in series between a power supply VCC3, an emitter electrode of the NPN triode Q1 is grounded, and the collector electrode of the NPN triode Q1 is led out to serve as an open-PHASE acquisition circuit output end PHASE connected to the processor.
Further, the number of the single-phase line silicon controlled trigger units is three.
Further, the feedback current input circuit comprises a current signal input end IN2, a second sampling filter circuit, a plurality of resistors and a voltage signal output end Vin2 connected with the processor, the current signal input end IN2 and a resistor R9 connected IN series between the current signal input end IN2 and the ground, the resistor R12 and a resistor R13 are further sequentially connected IN series between the current signal input end IN2 and the ground, and one end of the resistor R12 connected with the resistor R13 is connected with the voltage signal output end Vin2 IN series with the second sampling filter circuit.
Further, feedback current input circuit includes current signal input part IN2, second sampling filter circuit, wire jumper cap J2, a plurality of resistance and with voltage signal output part Vin2 that the treater is connected, a pin ground connection of wire jumper cap J2, series resistance R9 between another pin of wire jumper cap J2 and current signal input part IN2, still series resistance R12 and resistance R13 IN proper order between current signal input part IN2 and ground, establish ties between one end that resistance R12 and resistance R13 are connected and voltage signal output part Vin2 second sampling filter circuit.
Furthermore, the phase shift trigger controller with power regulation and power limitation further comprises a DIP switch connected with the feedback current input circuit and used for regulating the use mode and the soft start time of the feedback current input circuit.
Furthermore, the DIP switch is provided with six positions; when the 1 st bit switch is ON and other bits are OFF, the feedback current input mode is adopted, a current signal input end IN2 of the feedback current input circuit obtains an electric signal from the outside, the electric signal ON the load loop is accessed by the current signal input end IN2, at the moment, the feedback current input circuit collects the electric signal ON the load loop IN real time, and the soft start/soft stop time is fixed for 2 seconds; when the 1 st bit of the DIP switch is OFF and one of the 2 nd to 6 th bits of the switch is ON, the feedback current input mode is stopped, and the current signal input end IN2 of the feedback current input circuit does not obtain an electric signal from an external transmitter any more, but directly accesses a DC5V electric signal to switch the soft start/soft stop time of the motor.
The phase-shifting trigger controller with the power regulation and power limitation has the following advantages:
1. the power limiting circuit composed of the power limiting potentiometer RP is arranged between the resistor R8 and the current signal input end IN1, so that when a control signal sent by an external instrument and meter input by the current signal input end IN1 is a current signal, the resistor of the power limiting potentiometer RP of the power limiting circuit is changed, the magnitude of a collected signal input to the processor can be controlled, the duty ratio waveform signal output to the silicon controlled trigger circuit by the PWM port of the processor is controlled, the control output is limited, and the power limitation (namely amplitude limiting) is realized;
2. through the arrangement of the feedback current input circuit, the processor can detect the current of a load loop in real time and make feedback adjustment in real time, so that the power of a driving signal of the silicon controlled trigger circuit can be adjusted under the control of the processor;
3. through the double arrangement of the power limitation of the power limiting circuit and the power regulation of the feedback current input circuit, the damage of a load or a circuit caused by overlarge current on a load loop can be effectively avoided, the circuit safety is greatly improved, the use is more reliable, and the circuit is not only suitable for the control of a variable-resistance load, but also suitable for the control of various inductive loads;
4. the phase-failure acquisition circuit in the single-phase line silicon controlled trigger unit is arranged to acquire a trigger state signal of the silicon controlled trigger circuit in real time, so that the processor can monitor the trigger state of the silicon controlled trigger circuit according to the acquired signal of the phase-failure acquisition circuit; when the control output of the processor is inconsistent with the trigger state of the silicon controlled trigger circuit, the processor can immediately control the alarm circuit to give an alarm, so that damage is reduced;
5. through the arrangement of the alarm circuit, the alarm circuit can warn under various abnormal conditions, such as phase failure or overlarge load loop current, so that the use safety is greatly guaranteed.
Drawings
FIG. 1 is a functional block diagram of a phase-shift trigger controller with power regulation and power limitation according to the present invention;
FIG. 2 is a schematic diagram of an analog input circuit of the phase-shift trigger controller with power regulation and power limitation according to the present invention;
FIG. 3 is a schematic structural diagram of a single-phase line thyristor trigger unit of the phase-shift trigger controller with power regulation and power limitation according to the present invention; in the figure, after a resistor is connected in series with the negative electrode end of the light-emitting side of a photoelectric coupling unit of a single-phase circuit silicon controlled trigger unit, the negative electrode end is connected with a PWM output port CON1 of the processor;
FIG. 4 is a schematic diagram of a feedback current input circuit of a phase-shift trigger controller with power regulation and power limitation according to a first embodiment of the present invention;
fig. 5 is a schematic diagram of a second embodiment of a feedback current input circuit of a phase-shift trigger controller with power regulation and power limitation according to the present invention.
Detailed Description
The following describes in detail an embodiment of a phase-shift trigger controller with power regulation and power limitation according to the present invention with reference to the accompanying drawings:
as shown in fig. 1 and 2, a phase shift trigger controller with power regulation and power limitation includes a processor 1, an analog input circuit 2, a single-phase line thyristor trigger unit 3, a feedback current input circuit 4, an alarm circuit 5 and a power limitation circuit 6, where the single-phase line thyristor trigger unit 3 includes a thyristor trigger circuit 31 and a phase-loss acquisition circuit 32, the analog input circuit 2, the feedback current input circuit 4, the alarm circuit 5, the thyristor trigger circuit 31 and the phase-loss acquisition circuit 32 of the single-phase line thyristor trigger unit 3 are respectively connected to the processor 1, and the thyristor trigger circuit 31 and the phase-loss acquisition circuit 32 of the single-phase line thyristor trigger unit 3 are connected to each other; wherein:
the analog quantity input circuit 2 comprises a voltage signal input end IN0, a current signal input end IN1, a first sampling filter circuit 21, a jumper cap J1, a plurality of resistors and an analog quantity voltage output end Vin1 connected with the processor 1, one pin J1-1 of the jumper cap J1 is grounded, a resistor R8 is connected between the other pin J1-2 of the jumper cap J1 and the voltage signal input end IN0 IN series, the first sampling filter circuit 21 is connected with the resistor R11 IN parallel, the parallel circuit of the first sampling filter circuit 21 and the resistor R11 and the resistor R10 are connected between one end of the resistor R8 connected with the voltage signal input end IN0 and the ground IN series, the resistor R11 is connected with the ground, and the output end of the first sampling filter circuit 21 is connected with the analog quantity voltage output end Vin 1;
the power limiting circuit 6 is composed of a power limiting potentiometer RP, a current signal input end IN1 IN the analog input circuit 2 is connected with a movable end of the power limiting potentiometer RP, and one end of a resistor R8 connected with a voltage signal input end IN0 is connected with a fixed end of the power limiting potentiometer RP;
the open-phase acquisition circuit 32 is used for acquiring the trigger state signal of the silicon controlled trigger circuit 31.
The analog quantity input circuit 2 is used for accessing a control signal sent by an external instrument and meter and finally transmitting the control signal sent by the accessed external instrument and meter to the processor 1 in the form of a voltage signal.
The invention relates to a phase-shifting trigger controller with power regulation and power limitation.A analog input circuit 2 is provided with a voltage signal input end IN0 and a current signal input end IN1, and the two input ends are simultaneously provided with a jumper cap J1 so as to access a voltage signal or a current signal IN a time-sharing way.
According to the phase-shift trigger controller with the power regulation and power limitation, the jumper cap J1 is provided with three pins generally, and the resistor R8 can be connected with the ground or the resistor R8 can be suspended by operating the jumper cap J1.
The invention relates to a phase-shifting trigger controller with power regulation and power limitation, IN particular to a phase-shifting trigger controller which is characterized IN that when a control signal sent by an external instrument is a voltage signal, a jumper wire cap J1 is operated to disconnect a pin J1-1 grounded by the jumper wire cap J1 from a pin connected with a resistor R8, the resistor R8 is suspended, then the voltage signal sent by the external instrument is connected from a voltage signal input end IN0, the voltage signal is divided by a resistor R10 and a resistor R11, and is filtered and stabilized by a first sampling filter circuit 21 and then is sent to a processor 1 from an analog quantity voltage output end Vin 1; when a control signal sent by an external instrument is a current signal, the jumper wire cap J1 is operated, a pin J1-1 of the jumper wire cap J1, which is grounded, is connected with a pin of a connecting resistor R8, then the current signal sent by the external instrument is connected through a current signal input end IN1, the connected current signal passes through the resistor R8, sampling is completed under the action of the resistor R8 and is converted into a voltage signal, the voltage signal is divided by a resistor R10 and a resistor R11, then the voltage signal is filtered and stabilized through a first sampling filter circuit 21, and then the voltage signal is transmitted to the processor 1 through an analog quantity voltage output end Vin 1.
According to the phase-shifting trigger controller with the power regulation and power limitation, the resistor R10 and the resistor R11 form a voltage division circuit, and the acquired voltage output by the analog input circuit 2 can be flexibly controlled by setting the resistor R10 and the resistor R11 in the voltage division circuit, so that the acquired voltage meets the interface voltage requirement of the processor 1.
The invention relates to a phase-shifting trigger controller with power regulation and power limitation.A power limiting circuit 6 consists of a power limiting potentiometer RP, a current signal input end IN1 IN an analog input circuit 2 is connected with a movable end of the power limiting potentiometer RP, and one end of a resistor R8 connected with a voltage signal input end IN0 is connected with a fixed end of the power limiting potentiometer RP. The power limiting potentiometer RP and the resistor R8 form a voltage division circuit, and particularly, when a control signal sent by an external instrument is a current signal, the current signal passes through the power limiting potentiometer RP to realize voltage division acquisition; under the condition of voltage division acquisition, the power limiting circuit 6 is adjusted, the resistance value of the power limiting potentiometer RP is changed, and the magnitude of an acquisition signal input to the processor 1 can be controlled, so that a duty ratio waveform signal output to the silicon controlled trigger circuit 31 from a PWM (pulse width modulation) port of the processor 1 is controlled, the output is limited and controlled, and the power limitation is realized.
The invention relates to a phase-shifting trigger controller with power regulation and power limitation.A processor 1 is used for receiving a collected signal input by an analog input circuit 2 and converting the collected signal of the analog into a digital signal; the processor 1 outputs a PWM signal to the thyristor trigger circuit 31 of the single-phase line thyristor trigger unit 3 according to the acquisition signal input by the analog input circuit 2.
The silicon controlled trigger circuit 31 of the single-phase line silicon controlled trigger unit 3 is used for receiving the PWM signal output by the processor 1 and generating a trigger signal according to the received PWM signal so as to control the silicon controlled on a load loop and enable the load loop to be switched on or switched off.
The phase shift trigger controller with power regulation and power limitation of the present invention preferably includes, as shown in fig. 3, the thyristor trigger circuit 31 includes a photoelectric coupling unit 311, a bidirectional thyristor B1, a plurality of resistors, and an external thyristor connection end 312, a positive terminal of a light emitting side of the photoelectric coupling unit 311 is connected to a power supply VCC1, a negative terminal of the light emitting side of the photoelectric coupling unit 311 is connected to a PWM output port of the processor 1 after being connected to a resistor R44 in series, one of two ends of a light sensing side of the photoelectric coupling unit 311 is connected to a first main terminal of the bidirectional thyristor B1, the other end of the light sensing side of the photoelectric coupling unit 311 is connected to a control electrode of the bidirectional thyristor B1 after being connected to a resistor R47 in series, and a second main terminal of the bidirectional thyristor B1 after being connected to a resistor R53 in series is led out together with the first main terminal of the bidirectional thyristor B1 as the external thyristor connection end 312.
The invention relates to a phase-shift trigger controller with power regulation and power limitation, in particular to a PWM (pulse width modulation) signal output by a processor 1, which is input to a light-emitting side of a photoelectric coupling unit 311 to control the on-off of the photoelectric coupling unit 311, so as to control a bidirectional thyristor B1, and enable an external thyristor connecting end 312 to output a trigger signal to control a thyristor on a load loop to switch on or off the load loop.
The phase-shift trigger controller with power regulation and power limitation of the invention drives the photoelectric coupling unit 311 by changing the PWM signal waveform output by the processor 1, thereby achieving the purpose of controlling the controllable silicon on the load loop. According to the phase-shifting trigger controller with the power regulation and power limitation functions, the photoelectric coupling unit 311 plays a role in physical isolation, so that the input and the output of the silicon controlled trigger circuit 31 are isolated, the input and the output are not physically connected, the anti-interference capability of the silicon controlled trigger circuit 31 is greatly enhanced, and the problem of interference caused by voltage distortion when the control is carried out by changing the conduction angle of an alternating current waveform in the phase-shifting trigger process is effectively solved.
In the phase shift trigger controller with power regulation and power limitation of the present invention, preferably, the photoelectric coupling unit 311 includes a first bidirectional thyristor output optical coupler U8 and a second bidirectional thyristor output optical coupler U9 connected in series.
In the phase-shift trigger controller with power regulation and power limitation, the photoelectric coupling unit 311 can be a bidirectional thyristor output optical coupler or can be formed by two bidirectional thyristor output optical couplers connected in series; compared with a bidirectional thyristor output optical coupler, the two bidirectional thyristor output optical couplers connected in series have higher voltage resistance, and can be more suitable for different application occasions. If the load is normally supplied by three-phase power, the effective value of the line voltage of the three-phase power is AC380V, and the peak value is the effective value
The peak voltage is AC622V, and the withstand voltage of the single triac output optocoupler is usually 600V, so that the two triac output optocouplers connected in series are usually adopted to form the optoelectronic coupling unit 311, the withstand voltage requirement required by the circuit is met, and the circuit is not easy to damage due to high voltage.
According to the phase-shifting trigger controller with the power regulation and power limitation, the first bidirectional controllable silicon output optocoupler U8 and the second bidirectional controllable silicon output optocoupler U9 can be MOC3052 chips or MOC3063SR2VM chips or MOC3041 chips generally.
According to the phase-shift trigger controller with the power regulation and power limitation, the silicon controlled trigger circuit 31 of the silicon controlled trigger unit 3 of the single-phase line is used for triggering and controlling the silicon controlled on a load loop according to the PWM signal output by the processor 1, so that the load loop is switched on or switched off; the open-phase acquisition circuit 32 is configured to acquire the trigger state signal of the thyristor trigger circuit 31 in real time, and output the acquired trigger state signal of the thyristor trigger circuit 31 to the processor 1.
The PHASE-shift trigger controller with power regulation and power limitation of the present invention preferably comprises a bridge rectifier circuit D3, an optocoupler U4, an NPN triode Q1 and a plurality of resistors, wherein the input end of the bridge rectifier circuit D3 is connected in series with a resistor R26 and then connected with the external thyristor connection end 312, the output end of the bridge rectifier circuit D3 is connected with the light emitting side of the optocoupler U4 to form a loop, the positive electrode of the light sensing side of the optocoupler U4 is connected with a series resistor R19 between a power supply VCC2, the negative electrode of the light sensing side of the optocoupler U4 is connected with a series resistor R20 between the ground, the negative electrode of the light sensing side of the optocoupler U4 is also connected with the base electrode of the NPN triode Q1, the collector electrode of the NPN triode Q1 is connected with a series resistor R16 between the power supply VCC3, the emitter electrode of the NPN triode Q1 is grounded, and the collector electrode of the NPN triode Q1 is led out to be used as the PHASE-missing acquisition circuit output end PHASE connected to the processor 1.
The invention relates to a PHASE-shifting trigger controller with power regulation and power limitation, in particular to a bridge rectifier circuit D3, wherein an input end of the bridge rectifier circuit D3 is connected with an external silicon controlled rectifier connection end 312 after being connected with a resistor R26 in series, a trigger signal on the external silicon controlled rectifier connection end 312 is input into the bridge rectifier circuit D3, the bridge rectifier circuit D3 rectifies an input alternating current trigger signal to convert the input alternating current trigger signal into a direct current signal, a light sensing side of the optical coupler U4 is conducted after the optical coupler U4 is driven, the voltage of a power supply VCC2 is divided by a resistor R19 and a resistor R20 and then is connected to a base electrode of an NPN triode Q1 to drive the NPN triode Q1 to be saturated, a loop is formed among the power supply VCC3, the resistor R16 and the ground, and a PHASE-failure acquisition circuit output end PHASE outputs an electric signal to a processor 1.
According to the phase-shifting trigger controller with the power regulation and power limitation, the optocoupler U4 in the bridge rectifier circuit D3 plays a role in physical isolation, so that the output is more stable, and the interference is less.
The invention relates to a phase-shifting trigger controller with power regulation and power limitation.A processor 1 is used for receiving an electric signal input by a bridge rectifier circuit D3 and determining whether controllable silicon on a corresponding phase line of a load loop is triggered or not and whether the corresponding phase line of the load loop is conducted or not according to the electric signal input by the bridge rectifier circuit D3.
According to the phase-shifting trigger controller with the power regulation and power limitation, when recognizing that an IO port connected with a bridge rectifier circuit D3 is a low level, a processor 1 indicates that a phase circuit is connected and the voltage of the phase circuit is in a working state; conversely, when the processor 1 recognizes that the IO port connected to the bridge rectifier circuit D3 is at a high level, it indicates that the phase line is not connected, and there is no voltage thereon, and the phase line is in a phase-missing state.
According to the phase-shift trigger controller with the power regulation and power limitation, the number of the single-phase line silicon controlled trigger units 3 is three. Since the load is usually supplied by three-phase power, and the thyristors in the three-phase power are all required to be controlled, preferably, the number of the single-phase line thyristor trigger units 3 is three, and the external thyristor connection ends of the thyristor trigger circuits in the three single-phase line thyristor trigger units 3 are respectively connected with the thyristors in the three-phase line, so as to control the thyristors in the three-phase line.
According to the phase-shifting trigger controller with the functions of power regulation and power limitation, when the number of the single-phase line silicon controlled trigger units 3 is three, after the negative electrode ends of the light-emitting sides of the photoelectric coupling units of the three single-phase line silicon controlled trigger units 3 are connected with resistors in series, the negative electrode ends are respectively connected with the PWM output ports CON1, CON2 and CON3 of the processor 1 in a one-to-one corresponding mode; the PHASE-lack acquisition circuit output ends PHASE of the three single-PHASE line silicon controlled trigger units 3 are correspondingly connected with the three interfaces of the processor 1 one by one.
The phase-shift trigger controller with the power regulation and the power limitation is characterized in that the feedback current input circuit 4 is used for acquiring an upper current signal of a circuit where the controlled silicon controlled rectifier is located and feeding the acquired current signal back to the processor 1.
The invention relates to a phase-shift trigger controller with power regulation and power limitation, and a first embodiment of a feedback current input circuit 4 is shown in figure 4. As shown IN fig. 4, the feedback current input circuit 4 includes a current signal input terminal IN2, a second sampling filter circuit 41, a plurality of resistors, and a voltage signal output terminal Vin2 connected to the processor 1, a resistor R9 is connected between the current signal input terminal IN2 and ground IN series, a resistor R12 and a resistor R13 are also connected between the current signal input terminal IN2 and ground IN series, and the second sampling filter circuit 41 is connected between one end of the resistor R12 connected to the resistor R13 and the voltage signal output terminal Vin2 IN series.
IN the phase shift trigger controller with power regulation and power limitation, IN the first embodiment of the feedback current input circuit 4, a current signal on a load loop is transmitted to a current signal input end IN2 by a transmitter, the accessed current signal is sampled under the action of a resistor R9 through a resistor R9 and is converted into a voltage signal, the voltage signal is subjected to voltage division by a resistor R12 and a resistor R13, then is subjected to filtering and voltage stabilization by a second sampling filter circuit 41, and then is transmitted to the processor 1 through a voltage signal output end Vin 2.
The invention relates to a phase-shift trigger controller with power regulation and power limitation, and a second embodiment of the feedback current input circuit 4 is shown in figure 5. As shown IN fig. 5, the feedback current input circuit 4 includes a current signal input terminal IN2, a second sampling filter circuit 41, a jumper cap J2, a plurality of resistors, and a voltage signal output terminal Vin2 connected to the processor 1, a pin J2-1 of the jumper cap J2 is grounded, a resistor R9 is connected between another pin J2-2 of the jumper cap J2 and the current signal input terminal IN2, a resistor R12 and a resistor R13 are also connected between the current signal input terminal IN2 and the ground IN series, and one end of the resistor R12 connected to the resistor R13 is connected to the voltage signal output terminal Vin2 IN series with the second sampling filter circuit 41.
In the phase shift trigger controller with power regulation and power limitation, according to the second embodiment of the feedback current input circuit 4, the jumper cap J2 is provided, the jumper cap J2 has three pins, and the resistor R9 can be connected with the ground or the resistor R9 can be suspended by operating the jumper cap J2.
In the phase shift trigger controller with power regulation and power limitation, in the second embodiment of the feedback current input circuit 4, the acquisition of voltage or current can be realized by operating the jumper cap J2. When a current signal on a load loop needs to be acquired, the jumper wire cap J2 is operated to connect the resistor R9 with the ground, the current signal on the load loop is accessed from the current signal input end IN2 through the transmitter, the accessed current signal passes through the resistor R9, sampling is completed under the action of the resistor R9 and is converted into a voltage signal, the voltage signal is subjected to voltage division through the resistor R12 and the resistor R13, then is subjected to filtering and voltage stabilization through the second sampling filtering circuit 41, and then is transmitted to the processor 1 through the voltage signal output end Vin 2; when the voltage signal on the load loop needs to be collected, the jumper cap J2 is operated to suspend the resistor R9, the voltage signal on the load loop is accessed through the transmitter through the current signal input end IN2, the accessed voltage signal is directly subjected to voltage division through the resistor R12 and the resistor R13, then is subjected to filtering and voltage stabilization through the second sampling filtering circuit 41, and then is transmitted to the processor 1 through the voltage signal output end Vin 2.
Compared with the first implementation mode of the feedback current input circuit 4, the second implementation mode of the phase shift trigger controller with the power regulation and the power limitation has stronger functions and more flexible application.
The invention relates to a phase-shifting trigger controller with power regulation and power limitation.A processor 1 is used for receiving an electric signal input by a feedback current input circuit 4 and performing power limitation output on the magnitude of a feedback current by adopting fixed proportional-integral regulation according to the magnitude of the electric signal. If the feedback electrical signal rises rapidly, the processor 1 actively adjusts and reduces the power output from the PWM port to the thyristor trigger circuit 31, so as to prevent the adverse effect caused by too large loop current due to the rise of the load resistance.
The phase-shift trigger controller with power regulation and power limitation of the present invention preferably further comprises a DIP switch 7 connected to the feedback current input circuit 4 for adjusting the use mode and soft start time of the feedback current input circuit 4.
In the phase shift trigger controller with power regulation and power limitation, the DIP switch 7 is a toggle switch and is used for switching a feedback current input mode and switching a soft start/soft stop time constant. The number of bits of the DIP switch 7 is variable, and may be two, three, or several bits, as required.
According to the phase-shift trigger controller with the power regulation and power limitation, the DIP switch 7 is provided with six bits. If the 1 st bit switch is ON and other bits are OFF, the current input mode is a feedback current input mode, the current signal input end IN2 of the feedback current input circuit 4 obtains an electric signal from the outside, the electric signal ON the load loop is accessed from the current signal input end IN2, at the moment, the feedback current input circuit 4 acquires the electric signal ON the load loop IN real time, and the soft start/soft stop time is fixed for 2 seconds; when the 1 st bit of the DIP switch is OFF and one of the 2 nd to 6 th bits of the switch is ON, the feedback current input mode is stopped, the current signal input end IN2 of the feedback current input circuit 4 does not obtain an electric signal from an external transmitter any more, but directly accesses a DC5V electric signal to switch the soft start/soft stop time of the motor, and the 2 th to 6 th bits of the DIP switch 7 essentially divides the voltage of different resistors R12 and R13 for acquisition, so that the input voltage signals have different sizes and correspond to the switching soft start/soft stop time. The switching content of the specific DIP switch 7 is shown in the following table.
| DIP switch | Resistor R13 | Voltage signal output terminal Vin2 voltage | Soft start/ |
|
| 1 st bit ON, other OFF | Not applicable to | Dependent on the input | Fixed for 2 |
|
| 2 nd bit ON, other OFF | Is not connected | 0 | 1 | |
| Bit | ||||
| 3 ON, other OFF | 4.75 | 250mV | 3 seconds | |
| ON at 4 th bit and OFF at other times | 2.25 | 500mV | 5 | |
| Bit | ||||
| 5 ON, other OFF | 1K | 1V | 11 | |
| Bit | ||||
| 6 ON, other OFF | Short circuit | 5V | 50 seconds |
The phase-shifting trigger controller with power regulation and power limitation reduces the impact on the load by setting the power-on soft start/soft stop function, thereby being capable of better adapting to inductive loads with transformers, such as silicon-molybdenum rods, graphite, tungsten wires and the like.
The processor 1 is also used for sending a control signal to the alarm circuit 5 to enable the alarm circuit 5 to give an alarm. If, in the process that the processor 1 outputs the PWM signal to the scr trigger circuit 31 of the single-phase line scr trigger unit 3, but the processor 1 still recognizes that the IO port connected to the bridge rectifier circuit D3 is at a high level, the processor 1 sends a control signal to the alarm circuit 5 to make the alarm circuit 5 give an alarm if the phase line is in a phase-missing state. If the current signal fed back by the feedback current input circuit 4 is too large and exceeds a certain ratio of the measuring range, such as 15%, the processor 1 sends a control signal to the alarm circuit 5, so that the alarm circuit 5 gives an alarm to prompt a user that the load current is too large; at this time, in order not to generate a false determination, when the feedback current is smaller than the input analog signal, the function does not work.
When the phase-shifting trigger controller with power regulation and power limitation is used, the analog quantity input circuit 2 is provided with a voltage signal input end IN0 or a current signal input end IN1 which is connected with control signals such as 0-20mA, 4-20mA, 0-5V, 1-5V and other analog quantity signals sent by an external instrument; the external thyristor connection end 312 of the thyristor trigger circuit 31 in the single-phase line thyristor trigger unit 3 is connected with the thyristor on the load loop; when the feedback current input mode is used, the current signal input terminal IN2 of the feedback current input circuit 4 is connected to the electrical signal on the load loop through the transmitter.
IN the phase-shifting trigger controller with power regulation and power limitation, IN the use process, analog quantity signals such as 0-20mA, 4-20mA and the like sent by an external instrument are accessed to the analog quantity input circuit 2 from a current signal input end IN1, or analog quantity signals such as 0-5V, 1-5V and the like sent by an external instrument are accessed to the analog quantity input circuit 2 from a voltage signal input end IN0, and are transmitted to the processor 1 IN the form of voltage signals after passing through the analog quantity input circuit 2; the processor 1 acquires the sampling signal transmitted by the analog input circuit 2, converts the acquired signal into a digital signal, and then outputs a PWM signal to the silicon controlled trigger circuit 31 of the single-phase line silicon controlled trigger unit 3 according to the converted digital signal so as to trigger the silicon controlled on a load loop and switch on or off the load loop; meanwhile, the open-phase acquisition circuit 32 acquires the trigger state signal of the thyristor trigger circuit 31 in real time and outputs the acquired trigger state signal of the thyristor trigger circuit 31 to the processor 1; if the processor 1 still recognizes that the IO port connected to the bridge rectifier circuit D3 is at a high level and determines that the IO port is in a phase failure in the process of outputting the PWM signal to the thyristor trigger circuit 31 of the single-phase line thyristor trigger unit 3 by the processor 1, the processor 1 sends a control signal to the alarm circuit 5, so that the alarm circuit 5 gives an alarm. In the control process, the transmitter also transmits a current signal on a load loop to the feedback current input circuit 4 in real time, and the feedback current input circuit 4 feeds the current signal on the load loop back to the processor 1 in real time; the processor 1 performs power limiting output on the magnitude of the feedback current by adopting fixed proportional-integral regulation according to a signal fed back by the feedback current input circuit 4, for example, when a feedback electric signal rises rapidly, the processor 1 actively regulates and reduces the power output from a PWM (pulse-width modulation) port to the silicon controlled trigger circuit 31, and prevents adverse effects caused by too large loop current due to rise of load resistance; meanwhile, the processor 1 judges that the current signal on the load loop is too large, and when the certain ratio of the exceeding range is 15%, the processor 1 sends a control signal to the alarm circuit 5, so that the alarm circuit 5 gives an alarm to prompt a user that the load current is too large.
The phase-shifting trigger controller with the power regulation and power limitation has the following advantages:
1. the power limiting circuit 6 composed of a power limiting potentiometer RP is arranged between the resistor R8 and the current signal input end IN1, so that when a control signal sent by an external instrument and meter input by the current signal input end IN1 is a current signal, the magnitude of a collected signal input to the processor 1 can be controlled by changing the resistor of the power limiting potentiometer RP of the power limiting circuit 6, thereby controlling a duty ratio waveform signal output to the silicon controlled trigger circuit 31 by the PWM port of the processor 1, limiting and controlling output, and realizing power limitation (namely amplitude limiting);
2. through the setting of the feedback current input circuit 4, the processor 1 can detect the magnitude of the load loop current in real time and make feedback adjustment in real time, so that the power of the driving signal of the thyristor trigger circuit 31 can be adjusted under the control of the processor 1;
3. through the double arrangement of the power limitation of the power limiting circuit 6 and the power regulation of the feedback current input circuit 4, the damage of a load or a circuit caused by overlarge current on a load loop can be effectively avoided, the circuit safety is greatly improved, the use is more reliable, and the circuit is not only suitable for the control of a variable-resistance load, but also suitable for the control of various inductive loads;
4. the trigger state signal of the silicon controlled trigger circuit 31 is acquired in real time through the setting of the open-phase acquisition circuit 32 in the single-phase line silicon controlled trigger unit 3, so that the processor 1 can monitor the trigger state of the silicon controlled trigger circuit 31 according to the acquisition signal of the open-phase acquisition circuit 32; therefore, when the control output of the processor 1 is inconsistent with the trigger state of the silicon controlled trigger circuit 31, the processor 1 can immediately control the alarm circuit 5 to give an alarm, so that damage is reduced;
5. through the arrangement of the alarm circuit 5, the alarm circuit 5 can warn under various abnormal conditions, such as phase failure or overlarge load loop current, so that the use safety is greatly guaranteed.
The invention relates to a phase-shifting trigger controller with power regulation and power limitation, wherein resistors in each circuit mainly play a role of current limitation.
According to the phase-shifting trigger controller with the power regulation and power limitation, the processor 1 and the alarm circuit 5 are both of the conventional structures.
The phase-shifting trigger controller with the power regulation and the power limitation generally comprises a power supply module and a sampling reference circuit, and the power supply module and the sampling reference circuit are both of conventional structures, so that the invention is not explained more.
For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all should be considered as belonging to the protection scope of the invention.
Claims (8)
1. A phase-shift trigger controller with power regulation and power limitation is characterized in that: the single-phase line silicon controlled rectifier trigger unit comprises a silicon controlled rectifier trigger circuit and a phase failure acquisition circuit, the analog quantity input circuit, the feedback current input circuit, the alarm circuit, the silicon controlled rectifier trigger circuit and the phase failure acquisition circuit of the single-phase line silicon controlled rectifier trigger unit are respectively connected with the processor, and the silicon controlled rectifier trigger circuit and the phase failure acquisition circuit of the single-phase line silicon controlled rectifier trigger unit are connected; wherein:
the analog quantity input circuit comprises a voltage signal input end IN0, a current signal input end IN1, a first sampling filter circuit, a jumper wire cap J1, a plurality of resistors and an analog quantity voltage output end Vin1 connected with the processor, one pin of the jumper wire cap J1 is grounded, a resistor R8 is connected between the other pin of the jumper wire cap J1 and the voltage signal input end IN0 IN series, the first sampling filter circuit is connected with a resistor R11 IN parallel, the parallel circuit of the first sampling filter circuit and the resistor R11 and a resistor R10 are connected between one end of the resistor R8 connected with the voltage signal input end IN0 and the ground IN series, the resistor R11 is connected with the ground, and the output end of the first sampling filter circuit is connected with the analog quantity voltage output end Vin 1; when a voltage signal is input at the voltage signal input end IN0, the pin of the jumper wire cap J1 which is grounded is disconnected with the pin connected with the resistor R8, and the resistor R8 is suspended; when a current signal is input from the current signal input end IN1, the pin of the jumper wire cap J1 which is grounded is connected with the pin of the connecting resistor R8;
the feedback current input circuit is used for acquiring a current signal on a line where the controlled silicon controlled rectifier is located and feeding the acquired current signal back to the processor;
the power limiting circuit consists of a power limiting potentiometer RP, a current signal input end IN1 IN the analog input circuit is connected with a movable end of the power limiting potentiometer RP, and one end of a resistor R8 connected with a voltage signal input end IN0 is connected with a fixed end of the power limiting potentiometer RP;
and the open-phase acquisition circuit is used for acquiring the trigger state signal of the silicon controlled trigger circuit.
2. The phase-shift trigger controller with power regulation and power limitation of claim 1, wherein: silicon controlled rectifier trigger circuit includes optoelectronic coupling unit, bidirectional thyristor B1, a plurality of resistance and outside silicon controlled rectifier link, the positive terminal and the power VCC1 of the luminous side of optoelectronic coupling unit are connected, the negative pole end series resistance R44 of the luminous side of optoelectronic coupling unit after with the PWM delivery outlet of treater is connected, one end is connected with bidirectional thyristor B1's first main terminal in the both ends of optoelectronic coupling unit light sense side, the other end series resistance R47 after is connected with bidirectional thyristor B1's control pole, draw forth with bidirectional thyristor B1's first main terminal behind bidirectional thyristor B1's the second main terminal series resistance R53 and regard as outside silicon controlled rectifier link jointly.
3. The phase-shift trigger controller with power regulation and power limitation of claim 2, wherein: the photoelectric coupling unit comprises a first bidirectional thyristor output optical coupler U8 and a second bidirectional thyristor output optical coupler U9 which are connected in series.
4. The phase-shift trigger controller with power regulation and power limitation of claim 2, wherein: the open-PHASE acquisition circuit comprises a bridge rectifier circuit D3, an optocoupler U4, an NPN triode Q1 and a plurality of resistors, wherein the input end of the bridge rectifier circuit D3 is connected with the external silicon controlled rectifier connecting end after being connected with a resistor R26 in series, the output end of the bridge rectifier circuit D3 is connected with the light emitting side of the optocoupler U4 to form a loop, a resistor R19 is connected between the positive electrode of the light sensing side of the optocoupler U4 and a power supply VCC2 in series, the negative electrode of the light sensing side of the optocoupler U4 is connected with a series resistor R20 between the ground, the negative electrode of the light sensing side of the optocoupler U4 is also connected with the base electrode of an NPN triode Q1, the collector electrode of the NPN triode Q1 is connected with a series resistor R16 between a power supply VCC3, the emitter electrode of the NPN triode Q1 is grounded, and the collector electrode of the NPN triode Q1 is led out to serve as the PHASE-lack acquisition circuit output end PHASE connected to the processor.
5. The phase-shift trigger controller with power regulation and power limitation of claim 1, wherein: the number of the single-phase line silicon controlled rectifier trigger units is three.
6. The phase-shift trigger controller with power regulation and power limitation of claim 1, wherein: feedback current input circuit includes current signal input part IN2, second sampling filter circuit, a plurality of resistance and with voltage signal output part Vin2 that the treater is connected, current signal input part IN2 and ground series resistance R9, current signal input part IN2 and ground still series resistance R12 and resistance R13 IN proper order, establish ties between one end that resistance R12 and resistance R13 are connected and voltage signal output part Vin2 second sampling filter circuit.
7. The phase-shift trigger controller with power regulation and power limitation of claim 1, wherein: the feedback current input circuit comprises a current signal input end IN2, a second sampling filter circuit, a jumper cap J2, a plurality of resistors and a voltage signal output end Vin2 connected with the processor, one pin of the jumper cap J2 is grounded, a series resistor R9 is connected between another pin of the jumper cap J2 and the current signal input end IN2, a resistor R12 and a resistor R13 are sequentially connected between the current signal input end IN2 and the ground, and one end of the resistor R12 and the resistor R13 is connected with the voltage signal output end Vin2 to be connected IN series with the second sampling filter circuit.
8. The phase-shift trigger controller with power regulation and power limitation of claim 1, wherein: the phase-shift trigger controller with the power regulation and power limitation further comprises a DIP switch which is connected with the feedback current input circuit and is used for regulating the use mode and the soft start time of the feedback current input circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211418292.1A CN115483916B (en) | 2022-11-14 | 2022-11-14 | Phase-shifting trigger controller with power regulation and power limitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211418292.1A CN115483916B (en) | 2022-11-14 | 2022-11-14 | Phase-shifting trigger controller with power regulation and power limitation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115483916A CN115483916A (en) | 2022-12-16 |
| CN115483916B true CN115483916B (en) | 2023-03-03 |
Family
ID=84396216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211418292.1A Active CN115483916B (en) | 2022-11-14 | 2022-11-14 | Phase-shifting trigger controller with power regulation and power limitation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115483916B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229729Y (en) * | 1995-04-05 | 1996-06-19 | 北方工业大学 | Intelligent crystal thyratron trigger plate |
| CN2747762Y (en) * | 2004-08-20 | 2005-12-21 | 天津理工大学 | Bridge current liniter controller based on double single processor chip technology |
| CN2845273Y (en) * | 2005-08-03 | 2006-12-06 | 苏州市苏开电气成套有限公司 | Contact screen style program controlled phase controlling D.C.power source device |
| CN104503529A (en) * | 2014-12-26 | 2015-04-08 | 北华大学 | Thyristor single-phase voltage adjusting circuit and control method thereof |
| CN205647322U (en) * | 2016-03-25 | 2016-10-12 | 潘桂和 | Exempt from to be incorporated into power networks generator excitation control ware of signal |
| CN206370822U (en) * | 2016-12-12 | 2017-08-01 | 厦门宇电自动化科技有限公司 | The phase-shifting trigger module of AI instrument |
| CN211014532U (en) * | 2019-10-14 | 2020-07-14 | 甘肃有色冶金职业技术学院 | Silicon controlled rectifier tester |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7741731B2 (en) * | 2008-10-30 | 2010-06-22 | Arico Technology Co., Ltd. | PWM power regulator device |
| CN209070080U (en) * | 2018-09-09 | 2019-07-05 | 海盐电器厂 | A kind of silicon controlled trigger current test device |
| CN111983298B (en) * | 2020-08-24 | 2023-03-17 | 南京磐能电力科技股份有限公司 | Switching value acquisition circuit and method |
-
2022
- 2022-11-14 CN CN202211418292.1A patent/CN115483916B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229729Y (en) * | 1995-04-05 | 1996-06-19 | 北方工业大学 | Intelligent crystal thyratron trigger plate |
| CN2747762Y (en) * | 2004-08-20 | 2005-12-21 | 天津理工大学 | Bridge current liniter controller based on double single processor chip technology |
| CN2845273Y (en) * | 2005-08-03 | 2006-12-06 | 苏州市苏开电气成套有限公司 | Contact screen style program controlled phase controlling D.C.power source device |
| CN104503529A (en) * | 2014-12-26 | 2015-04-08 | 北华大学 | Thyristor single-phase voltage adjusting circuit and control method thereof |
| CN205647322U (en) * | 2016-03-25 | 2016-10-12 | 潘桂和 | Exempt from to be incorporated into power networks generator excitation control ware of signal |
| CN206370822U (en) * | 2016-12-12 | 2017-08-01 | 厦门宇电自动化科技有限公司 | The phase-shifting trigger module of AI instrument |
| CN211014532U (en) * | 2019-10-14 | 2020-07-14 | 甘肃有色冶金职业技术学院 | Silicon controlled rectifier tester |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115483916A (en) | 2022-12-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI472115B (en) | Protection relay | |
| CN104065315B (en) | A kind of many close-loop driven controllers of brushed DC motor | |
| CN204090165U (en) | Heating controller | |
| CN103277871B (en) | Outdoor fan of air-conditioner speed-regulating control device | |
| CN115483916B (en) | Phase-shifting trigger controller with power regulation and power limitation | |
| CN106685385A (en) | Contactless contactor having open-house protection function with no ground wire or neutral wire and silicon controlled rectifier breakdown alarm function | |
| CN108987185A (en) | A kind of multi-channel DC relay conducting control technology | |
| CN204578505U (en) | A kind of drive singal digital processing circuit cascade system for IGBT | |
| CN204967608U (en) | Power control circuit and anion controlling means | |
| CN106487165A (en) | Current sensor of motor controller current coefficient calibration system | |
| WO2014000765A1 (en) | Current demand control of lighting modules | |
| CN205587814U (en) | Semiautomatic welding system based on both -way communication | |
| CN213475207U (en) | Tower machine frequency conversion module recognition device | |
| CN210958200U (en) | Pulse voltage control circuit for electrostatic dust collection | |
| CN109931288B (en) | Stepless speed regulation controller for fan | |
| CN111817613A (en) | Tower crane frequency conversion device based on CAN bus and communication method | |
| CN215006423U (en) | Load power adjusting circuit for food processor | |
| CN204993141U (en) | Multi -functional generator excitation control ware | |
| CN109955239A (en) | A kind of dcs and robot device | |
| CN106325129B (en) | A kind of locomotive supplementary controlled system and Secondary System of Diesel Locomotive | |
| CN214045496U (en) | Multi-gear motor speed regulating device, motor and electric tool | |
| CN212305721U (en) | Drive device | |
| CN213338372U (en) | Heating control circuit and cooking utensil | |
| CN110133317A (en) | A kind of sliding block adjusted torque detection method | |
| CN218788152U (en) | A8 way live wire executor modules altogether for thing networking intelligence sewage treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |