CN211556953U - Drive control circuit of high-current electromagnetic coil - Google Patents
Drive control circuit of high-current electromagnetic coil Download PDFInfo
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- CN211556953U CN211556953U CN202020417979.3U CN202020417979U CN211556953U CN 211556953 U CN211556953 U CN 211556953U CN 202020417979 U CN202020417979 U CN 202020417979U CN 211556953 U CN211556953 U CN 211556953U
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Abstract
The utility model provides a heavy current solenoid's drive control circuit, include: the power supply control circuit comprises a charging module for converting input voltage into required voltage, a charging control module for controlling the charging module, a voltage acquisition module for acquiring the voltage on an energy storage capacitor in real time in proportion according to a resistance voltage division principle and sending the acquired voltage to the charging module, a control power supply module for providing power for a control part, an SCR (silicon controlled rectifier) driving module for converting an electromagnetic coil control signal into a circuit capable of driving a pulse signal conducted by a silicon controlled rectifier, a silicon controlled rectifier switch SCR, an energy storage capacitor C1, a current-limiting inductor L1 and a fly-wheel diode D1. The utility model discloses the loss that brings through resistance charging has been avoided in the use of constant current charging module. The use of the freewheeling diode and the inductor reversely recovers the residual reverse voltage of the capacitor, thereby improving the energy utilization. The above two points improve the energy utilization efficiency, and the volume and the efficiency of the device can be further reduced.
Description
Technical Field
The utility model relates to a drive control circuit technical field particularly, especially relates to a heavy current solenoid's drive control circuit.
Background
The electromagnetic coil is a device which is electrified to generate an electromagnetic field, a common electromagnetic coil driving control circuit is shown in figure 1, and the electromagnetic coil driving control circuit is characterized in that the circuit structure is simple, but when the energy storage capacitor C1 is charged, the energy storage capacitor C1 is realized through a resistor R1, the charging efficiency is low, the resistor R1 generates great heat, and the energy utilization rate is low. Secondly, the power frequency transformer T1 and the power resistor R1 are used, so that the power frequency transformer occupies a larger space, the whole circuit occupies a large space, the power frequency transformer is not suitable for occasions with limited space, and a large amount of heat energy is generated. Such circuits have limited applications.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned technical problems, a drive control circuit for a high-current electromagnetic coil is provided. The utility model discloses mainly utilize a heavy current solenoid's drive control circuit, a serial communication port, include:
the power supply control circuit comprises a charging module for converting input voltage into required voltage, a charging control module for controlling the charging module, a voltage acquisition module for acquiring the voltage on an energy storage capacitor in real time in proportion according to a resistance voltage division principle and sending the acquired voltage to the charging control module, a control power supply module for providing power for a control part, an SCR (silicon controlled rectifier) driving module for converting an electromagnetic coil control signal into a pulse signal capable of driving a silicon controlled rectifier to be conducted, a silicon controlled rectifier switch SCR, an energy storage capacitor C1, a current-limiting inductor L1 and a fly-wheel diode D1;
the charging module includes: the PWM switching power supply comprises a PWM switching power supply control chip, an operational amplifier, a switching power tube, a transformer, a filter capacitor, a rectifier diode and a resistor for signal processing;
the charging module and the charging control module perform constant-current charging on the capacitor C1, the voltage acquisition circuit controls the charging voltage on the energy storage capacitor C1, and the voltage of the energy storage capacitor C1 is kept unchanged.
Further, the charging control module compares the collected voltage signal with a preset voltage, when the voltage on the energy storage capacitor is lower than the preset voltage, a capacitor compensation signal is given, and only when the compensation signal exists and the electromagnetic coil control signal is idle, the charging control module gives a charging permission signal, and the charging module starts to work.
Further, when the solenoid control signal is idle, the charging module fully charges the energy storage capacitor C1 to wait for discharging, and when the device detects the solenoid control signal, the charging module stops charging; the electromagnetic coil control signal can generate a pulse driving signal of the silicon controlled rectifier to control the conduction of the silicon controlled rectifier switch SCR; at the moment, the stored energy of the capacitor C1 is discharged through the silicon controlled switch SCR and the electromagnetic coil EL1, the discharge is LC resonance discharge, a resistor exists in an actual circuit, and the actual discharge is LC damping discharge;
when the capacitor voltage is discharged to 0V, the coil current reaches the maximum, when the coil current is reduced to 0A again, the silicon controlled switch SCR is automatically closed, and the voltage on the capacitor C1 is the negative maximum at the moment; when the SCR is turned off, the voltage across the electromagnetic coil EL1 becomes zero, and then the voltage across the capacitor C1 is reversed again through L1 and D1;
when the electromagnetic coil control signal disappears, the charging module works again to charge the capacitor C1 until the required voltage is charged, and the charging module enters the waiting discharge state again.
Further, the silicon controlled switch SCR is VS-40TPS12A, the current limiting inductor L1 is 1.2mH, the freewheeling diode D1 is 6a10, and the energy storage capacitor C1 is a 20UF film capacitor.
The utility model discloses the loss that resistance charging brought has been avoided in the use of constant current charging module. The use of the freewheeling diode and the inductor reversely recovers the residual reverse voltage of the capacitor, thereby improving the energy utilization. The above two points improve the energy utilization efficiency, and the device volume can be further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a circuit diagram of a general solenoid drive control circuit.
Fig. 2 is a circuit diagram of the driving and controlling circuit of the electromagnetic coil of the present invention.
Fig. 3 is a waveform diagram of the driving control circuit of the electromagnet of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
As shown in fig. 2-3, the present invention provides a drive control circuit for a high current electromagnetic coil, which comprises: the intelligent power supply device comprises a charging module for converting input voltage into required voltage, a charging control module for controlling the charging module, a voltage acquisition module for acquiring the voltage on an energy storage capacitor in real time in proportion according to a resistance voltage division principle and sending the acquired voltage to the charging control module, a control power supply module for providing power for a control part, an SCR (silicon controlled rectifier) driving module for converting an electromagnetic coil control signal into a pulse signal capable of driving a silicon controlled rectifier to be conducted, a silicon controlled rectifier switch SCR, an energy storage capacitor C1, a current-limiting inductor L1 and a fly-wheel diode D1.
In the present application, as a preferred embodiment, the charging module includes: the PWM switching power supply comprises a PWM switching power supply control chip, an operational amplifier, a switching power tube, a transformer, a filter capacitor, a rectifier diode and a resistor for signal processing. The charging module described in this application can also use off-the-shelf modules on the market that meet the requirements. However, the charging module needs to be externally controllable, and the charging module can work only when a charging permission signal is given from the outside.
As a preferred embodiment of the present application, the charging module and the charging control module perform constant current charging on the capacitor C1, the voltage acquisition circuit controls the charging voltage on the energy storage capacitor C1, and the voltage of the energy storage capacitor C1 remains unchanged.
In a preferred embodiment of the present application, the charging control module compares the collected voltage signal with a preset voltage, and provides a capacitor compensation signal when the voltage on the energy storage capacitor is lower than the preset voltage, and the charging control module provides a charging enable signal only when the compensation signal is present and the solenoid control signal is idle, and the charging module starts to operate.
Meanwhile, when the electromagnetic coil control signal is idle, the charging module fully charges the energy storage capacitor C1 to wait for discharging, and when the device detects the electromagnetic coil control signal, the charging module stops charging; the electromagnetic coil control signal can generate a pulse driving signal of the silicon controlled rectifier to control the conduction of the silicon controlled rectifier switch SCR; at this time, the stored energy of the capacitor C1 is discharged through the thyristor SCR and the electromagnetic coil EL1, and the discharge is LC resonance discharge, and there is a resistance in the actual circuit, and the discharge is actually LC damping discharge.
Part of the energy is consumed in the circuit and the coil, so that the coil current reaches the maximum when the capacitor voltage reaches 0V, the silicon controlled switch SCR is automatically closed when the coil current drops to 0A again, and the voltage on the capacitor C1 is at the negative maximum; when the SCR is turned off, the voltage across the electromagnetic coil EL1 becomes zero, and then the voltage across the capacitor C1 is reversed again through L1 and D1.
The control power supply module is a module for providing power supply for each circuit, and corresponding module circuits are selected according to actual input voltage, the input power supply of the control power supply module is DC24V, so that the LM7815 is directly used for control power supply, and when the input is AC220V, the AC/DC switching power supply module can be used for supplying power.
In the present application, when the solenoid control signal disappears, the charging module works again to charge the capacitor C1 until the required voltage is reached, and then the charging module enters the standby discharge again. The whole working time of the electromagnetic coil is the time period when the current of the electromagnetic coil is not 0, and only the current on the electromagnetic coil can generate a useful magnetic field.
As a preferred embodiment of the present application, the SCR is VS-40TPS12A, the current limiting inductor L1 is 1.2mH, the freewheeling diode D1 is 6a10, and the energy storage capacitor C1 is a 20UF film capacitor.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. A drive control circuit for a high current electromagnetic coil, comprising:
the power supply control circuit comprises a charging module for converting input voltage into required voltage, a charging control module for controlling the charging module, a voltage acquisition module for acquiring the voltage on an energy storage capacitor C1 in real time in proportion according to a resistance voltage division principle and sending the acquired voltage to the charging control module, a control power supply module for providing power for a control part, an SCR (silicon controlled rectifier) driving module for converting a solenoid coil control signal into a pulse signal capable of driving a silicon controlled rectifier to be conducted, a silicon controlled rectifier switch SCR, an energy storage capacitor C1, a current-limiting inductor L1 and a freewheeling diode D1;
the charging control module includes: the PWM switching power supply comprises a PWM switching power supply control chip, an operational amplifier, a switching power tube, a transformer, a filter capacitor, a rectifier diode and a resistor for signal processing;
the charging module and the charging control module perform constant current charging on the capacitor C1, and the voltage acquisition circuit controls the charging voltage on the energy storage capacitor C1 and keeps the voltage of the energy storage capacitor C1 unchanged.
2. A drive control circuit for a high current electromagnetic coil as claimed in claim 1, wherein:
the charging control module compares the acquired voltage signal with a preset voltage, a capacitor compensation signal is given when the voltage of the energy storage capacitor C1 is lower than the preset voltage, and the charging control module gives a charging permission signal and starts to work only when the compensation signal exists and the electromagnetic coil control signal is idle.
3. A drive control circuit for a high current electromagnetic coil as claimed in claim 1, wherein:
when the control signal of the electromagnetic coil EL1 is idle, the charging module fully charges the energy storage capacitor C1 to wait for discharging, and when the electromagnetic coil EL1 detects the control signal, the charging module stops charging; the control signal of the electromagnetic coil EL1 generates a pulse driving signal to control the conduction of the silicon controlled switch SCR; at the moment, the stored energy of the capacitor C1 is discharged through the silicon controlled switch SCR and the electromagnetic coil EL1, the discharge model is LC resonance discharge, a resistor exists in an actual circuit, and LC damping discharge is actually realized;
when the capacitor voltage is discharged to 0V, the coil current reaches the maximum, when the coil current is reduced to 0A again, the silicon controlled switch SCR is automatically closed, and the voltage on the capacitor C1 is the negative maximum at the moment; when the SCR is turned off, the voltage across the electromagnetic coil EL1 becomes zero, and then the voltage across the capacitor C1 is reversed again through L1 and D1;
when the control signal of the electromagnetic coil EL1 disappears, the charging module works again to charge the capacitor C1 until the required voltage is charged, and the charging module enters the waiting discharge state again.
4. A drive control circuit for a high current electromagnetic coil as claimed in claim 1, wherein:
the SCR is VS-40TPS12A, the current-limiting inductor L1 is 1.2mH, the freewheeling diode D1 is 6A10, and the energy-storage capacitor C1 is a 20UF film capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020417979.3U CN211556953U (en) | 2020-03-27 | 2020-03-27 | Drive control circuit of high-current electromagnetic coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020417979.3U CN211556953U (en) | 2020-03-27 | 2020-03-27 | Drive control circuit of high-current electromagnetic coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211556953U true CN211556953U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020417979.3U Active CN211556953U (en) | 2020-03-27 | 2020-03-27 | Drive control circuit of high-current electromagnetic coil |
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|---|---|
| CN (1) | CN211556953U (en) |
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2020
- 2020-03-27 CN CN202020417979.3U patent/CN211556953U/en active Active
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