CN210200635U

CN210200635U - Intelligent controller of magnetic latching operating mechanism

Info

Publication number: CN210200635U
Application number: CN201921290618.0U
Authority: CN
Inventors: Chunsheng Hu; 胡春生
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-10
Filing date: 2019-08-10
Publication date: 2020-03-27
Anticipated expiration: 2029-08-10

Abstract

The utility model relates to an intelligent controller of a magnetic latching operating mechanism, which comprises a singlechip system, a distributed power supply, an operation display interface, a Bluetooth communication module, a clock, a memory, a bridge type drive, a voltage measurement circuit, a pulse switch charging circuit, a switching power supply circuit, a DC-DC boosting circuit, a PFC circuit and the like; the intelligent controller can work normally, monitors the voltage change of the energy storage capacitor, and outputs a PWM control signal to control the pulse switch charging circuit to charge the energy storage capacitor; through manual operation, the singlechip system outputs a pulse width control signal, the bridge type driving circuit controls the energy storage capacitor to be connected with the excitation coil for discharging, and the excitation current drives the magnetic latching operating mechanism to act; the wireless operation of the smart phone is realized through the Bluetooth communication module, and the real-time event information can be accessed by using the clock circuit and the EEPROM.

Description

Intelligent controller of magnetic latching operating mechanism

Technical Field

The utility model relates to an intelligent magnetic latching switch controller is magnetic latching formula high-low voltage circuit breaker, contactor drive circuit's intelligent improvement, belongs to power equipment control protection technical field.

Background

In recent years, magnetic latching high-low voltage circuit breakers and contactors are provided, wherein a magnetic latching mechanism controller drives a movable iron core in a magnetic latching mechanism to move up and down, so that basic operation functions of switching on and switching off are realized; generally, a capacitor, a super capacitor or a battery is used for storing energy, and a pulse excitation circuit controls driving; there are some problems in practical use, such as: the switch can not be switched on and off when power is cut off; the linear circuit is adopted to charge the energy storage capacitor, the size is large, the speed is low, and the energy storage voltage of the energy storage capacitor is directly influenced by the external power supply voltage; the high-voltage power circuit and the low-voltage power circuit are not strictly isolated, and are easy to interfere with each other, and components are easy to damage.

Disclosure of Invention

An object of the utility model is to solve above-mentioned problem, provide a magnetic latching operating device intelligent controller. The technical scheme includes that a basic management system is formed by a single chip microcomputer, wherein the single chip microcomputer is externally connected with a clock circuit, a memory, an RS485 communication circuit, a Bluetooth wireless communication circuit and a display operation interface, then an external energy storage capacitor is charged and managed through a high-efficiency pulse charging circuit and a voltage detection circuit, and an external magnet retaining operating mechanism magnet exciting coil is connected with the energy storage capacitor in a forward or reverse direction through a bridge type driving circuit, so that the energy storage capacitor is discharged in the forward or reverse direction through the magnet exciting coil; the magnetic latching operating mechanism can be driven to carry out switching-on operation by the forward discharging current, the magnetic field of the permanent magnet can be offset by the reverse discharging current, so that the magnetic latching operating mechanism loses the holding force generated by the permanent magnet, and the magnetic latching operating mechanism generates switching-off operation under the action of external force. By adopting the latest power supply technology, AC 85V-265V alternating current power supplies output stable DC400V direct current power supplies through a PFC circuit, DC 24V-48V direct current power supplies output stable DC400V direct current power supplies through a transformer inversion boosting power supply circuit, one path of the DC400V direct current power supplies are used as a charging power supply of an energy storage capacitor, and the other path of the DC400V direct current power supplies are converted into a required low-voltage system working power supply. Isolation measures such as an optical coupler, a transformer and a distributed power supply are adopted to strictly isolate a high-voltage power supply working circuit from a low-voltage power supply working circuit, so that a circuit of a single chip microcomputer management system is not interfered by an internal high-voltage power supply working circuit or an external circuit. By adopting a specific software algorithm, whether the pulse charging circuit, the external energy storage capacitor and the excitation coil are normal or not can be judged, and system breakdown caused by some common wiring faults can be avoided.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

an intelligent controller of a magnetic latching operation mechanism comprises a single chip microcomputer system (1), a DC distribution power supply (2), an operation display interface (3), a Bluetooth communication module (4), an RS485 communication interface (5), a clock circuit (6), an EEPROM (7), a bridge type driving circuit (8), a voltage measuring circuit (9), a pulse switch charging circuit (10), a switching power supply circuit (11), a DC-DC transformer inversion boosting circuit (12), a PFC circuit (13), a rectifying circuit (14), diodes D1, D2, D3, D4, a capacitor C1 and a protective tube F1; the DC-DC transformer inversion boosting circuit (12) is connected to DC 24V-DC 48V direct current power supplies through a diode D1, and outputs DC400V direct current stabilized power supply through a diode D2; the PFC circuit (13) is connected with AC 85V-AC 265V alternating current power supplies through a rectifying circuit (14) and a protective tube F1, and outputs DC400V direct current stabilized power supply through a diode D3; the cathodes of the diodes D2 and D3 are combined and connected with the anode of the capacitor C1, the switching power supply circuit (11) and the pulse switch charging circuit (10); the switching power supply circuit (11) outputs +12V, +15V, -15V direct current power supplies, and then outputs direct current power supplies smaller than 6V through the DC distribution power supply (2), and the direct current power supplies are respectively connected with the functional circuits of all parts to provide working power supplies; the intelligent controller of the magnetic latching operating mechanism is connected with an energy storage capacitor (17), an excitation coil (16) of the magnetic latching operating mechanism, a DC 24-DC 48V direct current power supply or an AC 85V-AC 265V alternating current power supply to enter a working state; the singlechip system (1) is respectively connected with the EEPROM (7), the clock circuit (6), the RS485 communication interface (5), the Bluetooth communication module (4) and the operation display interface (3) through data communication interfaces; the voltage measuring circuit (9) is connected with the energy storage capacitor (17) and is connected with a voltage signal to be measured, and the voltage measuring circuit (9) outputs a signal to be measured related to the voltage of the energy storage capacitor (17) and is connected with the input port of the single chip microcomputer system (1); the pulse switch charging circuit (10) is connected with the energy storage capacitor (17) in series through a diode D4, the single chip microcomputer system (1) outputs two paths of PWM control signals to be connected with the pulse switch charging circuit (10), and the pulse switch charging circuit (10) controls a DC400V direct-current power supply to generate pulse charging current to charge the energy storage capacitor (17); the bridge type driving circuit (8) is respectively connected with the positive electrode and the negative electrode of the energy storage capacitor (17) and two ends of the excitation coil (16); the single chip microcomputer system (1) outputs four control signals to be connected with a bridge type driving circuit (8), and the bridge type driving circuit (8) controls an energy storage capacitor (17) and an excitation coil (16) to be conducted through a forward bridge circuit or a reverse bridge circuit; the intelligent mobile phone (15) is in wireless connection with the intelligent controller of the magnetic latching operating mechanism through the Bluetooth communication module (4) to perform data exchange and switching on and off operations.

The pulse switch charging circuit (10) is composed of a push-pull driving circuit (20), a pulse transformer T1, an optical coupler O2, MOS transistors Q1 and Q2, diodes D5 and D6, resistors R1-R5 and a capacitor C2; the turn ratio of the pulse transformer T1 is 1-5 times, and the optocoupler O2 uses a quick response switch optocoupler with push-pull output; the push-pull driving circuit (20) is respectively connected with a 12V power supply, a PWM1 input signal, a series circuit consisting of a capacitor C2 and a primary coil of a pulse transformer T1, the primary coil of the pulse transformer T1 is connected with the 12V power supply, the output of a secondary coil of the pulse transformer T1 is connected with the grid of a MOS tube Q1 and the cathode of a diode D5 after being subjected to voltage division through resistors R1 and R2, the source of the MOS tube Q1 is connected with the other end of the resistor R2, the anode of a diode D5, the cathode of the diode D6 and a power inductor L1, the drain of the MOS tube Q1 is connected with a DC400V power supply, and the anode of the diode D6 is; the positive electrode of the input end of the optical coupler O2 is connected with a resistor R3 in series and a resistor R4 in parallel and then is connected with a PWM2 input signal; the output side of the optical coupler O2 is connected with a 15V power supply and a high-voltage end ground wire, the push-pull output port of the optical coupler O2 is connected with the grid electrode of an MOS tube Q2 through a resistor R5, the drain electrode of the MOS tube Q2 is connected with a power inductor L1 and the anode of a diode D4, and the source electrode is connected with the high-voltage end ground wire; when PWM1 and PWM2 pulse signals are input at high level synchronously, MOS tubes Q1 and Q2 are conducted simultaneously, a DC400V direct-current power supply is loaded to two ends of a power inductor L1, and current flows through the power inductor L1 to store energy; the PWM1 signal keeps high level, after the PWM2 signal is changed from high level to low level, the MOS tube Q1 is conducted, the Q2 is cut off, the direct current power supply outputs charging current through the MOS tube Q1, the power inductor L1 and the diode D4, meanwhile, the power inductor L1 releases stored energy through the diode D4 and the freewheeling diode D6, the current is output, the two currents are superposed to generate charging current output higher than the power supply voltage, and the maximum charging current output is not more than twice of the direct current power supply voltage; resetting the PWM1 signal, when the PWM1 and the PWM2 signals are at low level at the same time, stopping outputting the charging current passing through the diode D4 when the stored energy of the power inductor L1 is completely released; the PWM1 and PWM2 signals with set duty ratio and width are continuously input, and the direct current power supply can generate continuous pulse charging current output through the pulse switch charging circuit (10).

The voltage measuring circuit (9) consists of a sampling amplifying circuit (19), an output amplifying circuit (18) and an optical coupler O1; the optical coupler O1 is a linear optical coupler and has a group of input signals and two groups of output signals; optical coupler O1 and sampling amplifier circuit (19) are connected +15V power and high voltage end ground, the positive pole of energy storage capacitor (17) is connected to sampling amplifier circuit (19) input, output signal connects optical coupler O1's input, a set of output of optical coupler O1 inserts sampling amplifier circuit (19) as feedback signal, the input of another set of output signal connection output amplifier circuit (18), output amplifier circuit (18) output voltage signal connection single chip microcomputer system (1) that awaits measuring, the voltage signal measurement value that awaits measuring is directly proportional to the actual voltage of energy storage capacitor (17).

The bridge type driving circuit (8) consists of IGBTs 1-4, a first IGBT driving circuit A (21), a second IGBT driving circuit A (22), a first IGBT driving circuit B (23), a second IGBT driving circuit B (24), diodes D9 and D10; the IGBT1, the IGBT2, the first IGBT drive circuit A (21) and the second IGBT drive circuit A (22) form a lower bridge circuit of the bridge drive circuit (8), the IGBT3, the IGBT4, the first IGBT drive circuit B (23) and the second IGBT drive circuit B (24) form an upper bridge circuit of the bridge drive circuit (8), an excitation coil (16) of the magnetic latching operating mechanism is connected in the middle of the bridge circuit, the positive electrode of an energy storage capacitor and a high-voltage end ground wire which are respectively connected with two ends of the upper bridge circuit and the lower bridge circuit of the bridge drive circuit (8) can be connected with the excitation coil (16) through the forward direction or the reverse direction of the bridge circuit, and the diodes D9 and D10 are respectively connected with the IGBT3 and the IGBT4 in; the IGBT driving circuit A consists of an optical coupler O4, a diode D8, a resistor R10, a resistor R11 and a resistor R12, the optical coupler O4 is provided with a push-pull output port, the output side of the optical coupler O4 is connected with a + 15V-15V power supply, the push-pull output port is connected with a G pole of the IGBT after being connected with a resistor R12 in series, and the diode D8 is reversely connected with the R12 in parallel; an input port of the optical coupler O4 is sequentially connected with a resistor R10 and a parallel resistor R11 in series and then connected with a control signal of the singlechip system (1); the IGBT driving circuit B is composed of an optocoupler O3, triodes Q3, Q4, a diode D7, resistors R6-R9 and a capacitor C3, the triodes Q3 and Q4 respectively adopt NPN and PNP tubes to form a push-pull output circuit, a collector of the triode Q3 is connected with the diode D7 in series and then connected with a +15V power supply, a collector of the triode Q4 is connected with a resistor R8, a capacitor C3 and an E pole of the IGBT, emitters of the triodes Q3 and Q4 are connected with a G pole of the IGBT after being connected with the resistor R4 in series, an input end of the optocoupler O4 is connected with a control signal of the singlechip system (1) after being connected with the resistor R4 and the parallel resistor R4, a collector output by the optocoupler O4 is connected with the capacitor C4, a collector of the triode Q4 and a cathode of the diode D4, and an emitter output by the optocoupler. The single chip microcomputer system outputs four paths of control signals CON1, CON2, CON3 and CON4 to respectively control the IGBT1, the IGBT2, the IGBT3 and the IGBT 4; when CON2 and CON4 are high level signals, and CON1 and CON3 are low level signals, the IGBT2 and the IGBT4 are conducted, the IGBT1 and the IGBT3 are cut off, the anode of the energy storage capacitor is connected with the ground wire of the high voltage end through the IGBT4, the exciting coil (16), the IGBT2 and the high voltage end, the energy storage capacitor (17) is connected with the exciting coil (16) through the bridge circuit in the forward direction for discharging, and the discharging current of the exciting coil (16) flows from the H + end to the T + end; when CON2 and CON4 are low level signals and CON1 and CON3 are high level signals, the IGBT2 and the IGBT4 are turned off, the IGBT1 and the IGBT3 are turned on, the anode of the energy storage capacitor is turned on through the IGBT3, the exciting coil (16), the IGBT1 and a high voltage end ground wire, the energy storage capacitor (17) is reversely connected with the exciting coil (16) through a bridge circuit to discharge, and the discharging current of the exciting coil (16) flows from a T + end to an H + end.

As mentioned above, the DC distribution power supply (2), the isolation optocouplers O1, O2, O3, O4 and the pulse transformer T1 are adopted, so that a low-voltage power supply working circuit and a high-voltage power supply working circuit are effectively isolated, mutual interference of internal circuits of the intelligent controller of the magnetic latching operating mechanism can be effectively avoided, and the work stability of the single chip microcomputer system (1) is ensured.

Furthermore, the DC-DC transformer inversion boosting circuit (12) can invert and boost DC 24V-DC 48V direct current power supply to DC400V stable direct current power supply; the PFC circuit (13) can convert AC 85V-AC 265V alternating current power supply into DC400V stable direct current power supply, and the power is more than 100W; in a practical process, the DC-DC transformer inversion booster circuit (12) and the PFC circuit (13) output DC power supply voltage is not limited to 400V, and circuit parameters can be adjusted according to actual needs to be adjusted to DC power supply output with different target voltages; the AC 85V-AC 265V AC power supply can be realized by using a BOOST circuit, besides generating DC400V stable DC power supply through a PFC circuit (13).

The singlechip system (1) is connected with the memory EEPROM (7) and the clock circuit (6), can read the real-time from the clock circuit (6), and accesses the system operation parameters, the real-time event record and the accumulated operation time in the memory EEPROM (7), and comprises: the power failure detection system comprises a working power supply voltage set value, an abnormality detection set value, an energy storage voltage set value, an opening and closing overcurrent detection set value, a PWM pulse signal duty ratio, a pulse width set value, CON1, CON2, CON3 and CON4 output signal width set values and the like, and real-time event records, accumulated operation times and operation time such as access circuit breakers, contactors starting, stopping, opening and closing switch actions, various abnormalities, emergency power supply and the like are recorded, so that the power failure is not lost.

The intelligent mobile phone (15) is wirelessly connected with the Bluetooth communication module (4) through a standard Bluetooth communication protocol, the Bluetooth communication module (4) is connected with the single chip microcomputer system (1) through a UART communication interface, and the intelligent mobile phone (15) can wirelessly communicate and perform online operation with the single chip microcomputer system (1); working operation parameters and real-time of the single chip microcomputer system (1) can be set and inquired through the smart phone (15), and historical event records, accumulated operation times and operation time can be inquired.

The single chip microcomputer system (1) monitors the voltage change of the energy storage capacitor (17) in real time through the voltage measuring circuit (9); PWM1 and PWM2 pulse signals with set pulse width length and duty ratio are output, and a pulse switch charging circuit (10) controls a DC400V direct current power supply to generate pulse charging current to charge an energy storage capacitor (17); when the energy storage voltage of the energy storage capacitor (17) rises to an abnormal detection set value, judging that the energy storage capacitor (17) is abnormal if the energy storage voltage added value of the energy storage capacitor (17) is not within the set value range according to an electrical formula dV/dt = I/C; if the energy storage voltage of the energy storage capacitor (17) cannot rise to the abnormal detection set value in the process, the abnormal function of the pulse switch charging circuit (10) or the abnormal disconnection of the energy storage capacitor (17) can be judged; under the condition that no abnormity is judged by the measurement, the single chip microcomputer system (1) compares the measured value and the set value of the energy storage voltage of the energy storage capacitor (17), and regulates the output of PWM1 and PWM2 pulse signals, so that the energy storage voltage of the energy storage capacitor (17) can be stabilized at the set value of the energy storage voltage.

After receiving a switching-on or switching-off request signal, the single chip microcomputer system (1) outputs a group of switching-on or switching-off control signals of CON1, CON2, CON3 and CON4 with set width, the switching-on (forward direction) or switching-off (reverse direction) bridge circuit of the bridge type driving circuit (8) is used for communicating the anode and the cathode of the energy storage capacitor (17) and two ends of the magnet exciting coil (16), and the energy storage capacitor (17) discharges in the forward direction or the reverse direction through the magnet exciting coil (16); the positive discharge current flows through the excitation coil (16) to generate a positive excitation magnetic field which is superposed with the magnetic field generated by the permanent magnet; under the action of the superimposed magnetic field, the movable iron core (armature) of the magnetic latching operating mechanism overcomes the external force and performs attraction motion to the static iron core, namely, the magnetic latching operating mechanism generates positive motion, and the closing operation process of a circuit breaker and a contactor of the magnetic latching mechanism is realized; after the switch-on operation, a discharging loop of the energy storage capacitor (17) and the excitation coil (16) is cut off, an excitation magnetic field disappears, a movable iron core attracted with a static iron core overcomes external force by virtue of attraction force generated by a permanent magnet magnetic field, and is kept in an attraction state, namely a switch-on state is kept; the reverse discharge current flows through the magnet exciting coil (16) to generate a reverse exciting magnetic field, the reverse exciting magnetic field counteracts a magnetic field generated by the permanent magnet, so that the attraction force between the static iron core and the movable iron core is reduced, and when the attraction force cannot overcome the external force, the movable iron core leaves the static iron core under the action of the external force to generate reverse motion, namely the opening operation process of the circuit breaker and the contactor of the magnetic latching mechanism; the electrical parameters of resistance, inductance value and capacitance of the excitation coil (16) and the like of the energy storage capacitor (17) are different, the discharging process of the energy storage capacitor (17) through the excitation coil (16) is also different, the pulse signal setting widths of CON1, CON2, CON3 and CON4 are adjusted, the excitation coil (16) and the energy storage capacitor (17) with different parameters can be adapted, and the process that the excitation coil (16) drives the movable iron core of the magnetic latching operating mechanism can be optimized; in the process of switching on or switching off, the single chip microcomputer system (1) monitors the change of the energy storage voltage of the energy storage capacitor (17) through the voltage measurement circuit (9) according to fixed time intervals, and the average discharge current flowing through the exciting coil (16) in each measurement time interval can be estimated according to the electrical formula I = CdV/dt; when the estimated discharge current exceeds a set protection value, the single chip microcomputer system (1) judges the abnormal state, enters abnormal protection processing, prevents the magnet retention operating mechanism from generating magnet exciting coil overcurrent due to the abnormity of moving iron core stop, magnet exciting coil turn-to-turn short circuit and the like, prevents the bridge type driving circuit (8) and the magnet exciting coil (16) from being damaged due to overcurrent, and has the system protection function.

The power is supplied by AC 85V-AC 265V alternating current power supply or DC 24V-DC 48V direct current power supply, and the field power supply condition can be generally met. Under the emergency condition, the DC24V standby storage battery can meet the power supply requirement of the intelligent controller of the magnetic holding mechanism, and the intelligent controller of the magnetic holding mechanism is very flexible and convenient to use.

Drawings

Fig. 1 is a diagram of an intelligent controller for a magnetic holding mechanism.

Fig. 2 is a diagram of a voltage measurement circuit and a pulse switch charging circuit.

FIG. 3 is a circuit diagram of the bridge driver.

Detailed Description

Referring to fig. 1, the intelligent controller for the magnetic latching operating mechanism comprises a single chip microcomputer system (1), a DC distributed power supply (2), an operation display interface (3), a Bluetooth communication module (4), an RS485 communication interface (5), a clock circuit (6), an EEPROM (7), a bridge type driving circuit (8), a voltage measuring circuit (9), a pulse switch charging circuit (10), a switching power supply circuit (11), a DC-DC transformer inversion boosting circuit (12), a PFC circuit (13), a rectifying circuit (14), diodes D1, D2, D3, D4, a capacitor C1 and a protective tube F1; the DC-DC transformer inversion boosting circuit (12) is connected to DC 24V-DC 48V direct current power supplies through a diode D1, and outputs DC400V direct current stabilized power supply through a diode D2; the PFC circuit (13) is connected with AC 85V-AC 265V alternating current power supplies through a rectifying circuit (14) and a protective tube F1, and outputs DC400V direct current stabilized power supply through a diode D3; the cathodes of the diodes D2 and D3 are combined and connected with the anode of the capacitor C1, the switching power supply circuit (11) and the pulse switch charging circuit (10); the switching power supply circuit (11) outputs +12V, +15V, -15V direct current power supplies, and then outputs 5V and 3.3V direct current power supplies through the DC distribution power supply (2), and the direct current power supplies are respectively connected with the functional circuits of each part to provide working power supplies; the intelligent controller of the magnetic latching operating mechanism is connected with an energy storage capacitor (17), an excitation coil (16) of the magnetic latching operating mechanism, a DC 24-DC 48V direct current power supply or an AC 85V-AC 265V alternating current power supply to enter a working state; the singlechip system (1) is respectively connected with the EEPROM (7), the clock circuit (6), the RS485 communication interface (5), the Bluetooth communication module (4) and the operation display interface (3) through data communication interfaces; the voltage measuring circuit (9) is connected with the energy storage capacitor (17) and is connected with a voltage signal to be measured, and the voltage measuring circuit (9) outputs a signal to be measured related to the voltage of the energy storage capacitor (17) and is connected with the input port of the single chip microcomputer system (1); the pulse switch charging circuit (10) is connected with the energy storage capacitor (17) in series through a diode D4, the single chip microcomputer system (1) outputs two paths of PWM control signals to be connected with the pulse switch charging circuit (10), and the pulse switch charging circuit (10) controls a DC400V direct-current power supply to generate pulse charging current to charge the energy storage capacitor (17); the bridge type driving circuit (8) is respectively connected with the positive electrode and the negative electrode of the energy storage capacitor (17) and two ends of the excitation coil (16); the single chip microcomputer system (1) outputs four control signals to be connected with a bridge type driving circuit (8), and the bridge type driving circuit (8) controls an energy storage capacitor (17) and an excitation coil (16) to be conducted through a forward bridge circuit or a reverse bridge circuit; the intelligent mobile phone (15) is in wireless connection with the intelligent controller of the magnetic latching operating mechanism through the Bluetooth communication module (4) to perform data exchange and switching on and off operations.

Referring to fig. 2, the pulse switch charging circuit (10) is composed of a push-pull driving circuit (20), a pulse transformer T1, an optical coupler O2, MOS transistors Q1 and Q2, diodes D5 and D6, resistors R1 to R5, and a capacitor C2; the turn ratio of the pulse transformer T1 is 1-5 times, the optical coupler O2 uses TLP250, and the quick-response switch optical coupler with push-pull output is provided; the push-pull driving circuit (20) is respectively connected with a +12V power supply, a PWM1 input signal, a series circuit formed by a capacitor C2 and a primary coil of a pulse transformer T1, the primary coil of the pulse transformer T1 is connected with the +12V power supply, the output of a secondary coil of the pulse transformer T1 is connected with a grid of a MOS tube Q1 and the cathode of a diode D5 after being subjected to voltage division through resistors R1 and R2, the source of the MOS tube Q1 is connected with the other end of the resistor R2, the anode of a diode D5, the cathode of the diode D6 and a power inductor L1, the drain of the MOS tube Q1 is connected with a DC400V power supply, and the anode of the diode D6 is; the positive electrode of the input end of the optical coupler O2 is connected with a resistor R3 in series and connected with R4 in parallel and then is connected with a PWM2 input signal; the output side of the optical coupler O2 is connected with a +15V power supply and a high-voltage end ground wire, a push-pull output port is connected with the grid electrode of an MOS tube Q2 through a resistor R5, the drain electrode of the MOS tube Q2 is connected with a power inductor L1 and the anode of a diode D4, and the source electrode is connected with the high-voltage end ground wire; when PWM1 and PWM2 pulse signals are input at high level synchronously, MOS tubes Q1 and Q2 are conducted simultaneously, a DC400V direct-current power supply is loaded to two ends of a power inductor L1, and current flows through the power inductor L1 to store energy; the PWM1 signal keeps high level, after the PWM2 signal is changed from high level to low level, the MOS tube Q1 is conducted, the Q2 is cut off, the direct current power supply outputs charging current through the MOS tube Q1, the power inductor L1 and the diode D4, meanwhile, the power inductor L1 releases stored energy through the diode D4 and the freewheeling diode D6, the current is output, the two currents are superposed to generate charging current output higher than the power supply voltage, and the maximum charging current output is not more than twice of the direct current power supply voltage; resetting the PWM1 signal, when the PWM1 and the PWM2 signals are at low level at the same time, stopping outputting the charging current passing through the diode D4 when the stored energy of the power inductor L1 is completely released; the PWM1 and PWM2 signals with set duty ratio and width are continuously input, the DC400V direct current power supply can generate continuous pulse charging current output through the pulse switch charging circuit (10), and the charging voltage is high, the current is large, and the efficiency is high.

The voltage measuring circuit (9) consists of a sampling amplifying circuit (19), an output amplifying circuit (18) and an optical coupler O1; the optical coupler O1 is a linear optical coupler HCNR200 and is provided with a group of input signals and two groups of output signals; the sampling amplifying circuit (19) and the output amplifying circuit (18) are constructed by a common integrated circuit operational amplifier; optical coupler O1 and sampling amplifier circuit (19) are connected +15V power and high voltage end ground, the positive pole of energy storage capacitor (17) is connected to sampling amplifier circuit (19) input, output signal connects optical coupler O1's input, a set of output of optical coupler O1 inserts sampling amplifier circuit (19) as feedback signal, the input of another set of output signal connection output amplifier circuit (18), output amplifier circuit (18) output voltage signal connection single chip microcomputer system (1) that awaits measuring, the voltage signal measurement value that awaits measuring is directly proportional to the actual voltage of energy storage capacitor (17).

Referring to fig. 3, the bridge driving circuit (8) is composed of IGBTs 1-4, a first IGBT driving circuit a (21), a second IGBT driving circuit a (22), a first IGBT driving circuit B (23), a second IGBT driving circuit B (24), diodes D9, D10; the IGBT1, the IGBT2, the first IGBT drive circuit A (21) and the second IGBT drive circuit A (22) form a lower bridge circuit of the bridge drive circuit (8), the IGBT3, the IGBT4, the first IGBT drive circuit B (23) and the second IGBT drive circuit B (24) form an upper bridge circuit of the bridge drive circuit (8), an excitation coil (16) of the magnetic latching operating mechanism is connected in the middle of the bridge circuit, the positive electrode of an energy storage capacitor and a high-voltage end ground wire which are respectively connected with two ends of the upper bridge circuit and the lower bridge circuit of the bridge drive circuit (8) can be connected with the excitation coil (16) through the forward direction or the reverse direction of the bridge circuit, and the diodes D9 and D10 are respectively connected with the IGBT3 and the IGBT4 in; the IGBT driving circuit A consists of an optocoupler O4, a diode D8, resistors R10, R11 and R12, the optocoupler O4 adopts TLP250 and is provided with a push-pull output port, the output side of the optocoupler is connected with + 15V-15V power supplies, the push-pull output port is connected with a G pole of the IGBT after being connected with a resistor R12 in series, and the diode D8 and the R12 are connected in parallel in an opposite direction; an input port of the optical coupler O4 is sequentially connected with a resistor R10 and a parallel resistor R11 in series and then connected with a control signal of the singlechip system (1); the IGBT driving circuit B consists of an optocoupler O3, a triode Q3, a Q4, a diode D7, resistors R6-R9 and a capacitor C3; the optocoupler O3 adopts a PC817, the triodes Q3 and Q4 respectively adopt NPN and PNP tubes to form a push-pull output circuit, a collector of the triode Q3 is connected with a +15V power supply after being connected with a diode D7 in series, a collector of the triode Q4 is connected with a resistor R8, a capacitor C3 and an E pole of an IGBT, emitters of the triodes Q3 and Q4 are connected with a G pole of the IGBT after being connected with a resistor R9 in series, an input end of the optocoupler O3 is connected with an R6 in series and connected with an R7 in parallel and then connected with a control signal of the singlechip system (1), a collector output by the optocoupler O3 is connected with a capacitor C3, a collector of the triode Q3 and a negative pole of the diode D7, and an emitter output by the. The single chip microcomputer system outputs four paths of control signals CON1, CON2, CON3 and CON4 to respectively control the IGBT1, the IGBT2, the IGBT3 and the IGBT 4; when CON2 and CON4 are high level signals, and CON1 and CON3 are low level signals, the IGBT2 and the IGBT4 are conducted, the IGBT1 and the IGBT3 are cut off, the anode of the energy storage capacitor is connected with the exciting coil (16) through the IGBT4, the exciting coil (16), the IGBT2 and a high voltage end ground wire (capacitor cathode), the energy storage capacitor (17) is connected with the exciting coil (16) through a bridge circuit in the forward direction to discharge, and the discharging current of the exciting coil (16) flows from the H + end to the T + end; when CON2 and CON4 are low level signals and CON1 and CON3 are high level signals, the IGBT2 and the IGBT4 are turned off, the IGBT1 and the IGBT3 are turned on, the anode of the energy storage capacitor is turned on through the IGBT3, the exciting coil (16), the IGBT1 and a high voltage end ground wire, the energy storage capacitor (17) is reversely connected with the exciting coil (16) through a bridge circuit to discharge, and the discharging current of the exciting coil (16) flows from a T + end to an H + end.

In the embodiment, the DC-DC transformer inverting and boosting circuit (12) adopts an SG3525A integrated circuit as a control chip, and can invert and boost DC 24V-DC 48V direct current power supply to DC400V stable direct current power supply by referring to a recommended circuit; the PFC circuit (13) adopts an L6562 integrated control chip, can convert AC 85V-AC 265V alternating current power supply into DC400V stable direct current power supply, and the power is more than 100W; in a practical process, the DC-DC transformer inversion booster circuit (12) and the PFC circuit (13) output DC power supply voltage is not limited to 400V, and circuit parameters can be adjusted according to actual needs to be adjusted to DC power supply output with different target voltages; the AC 85V-AC 265V AC power supply can be realized by using a BOOST circuit, besides generating DC400V stable DC power supply through a PFC circuit (13).

The single chip microcomputer system (1) monitors the voltage change of the energy storage capacitor (17) in real time through the voltage measuring circuit (9); PWM1 and PWM2 pulse signals with set pulse width length and duty ratio are output, and a pulse switch charging circuit (10) controls a DC400V direct current power supply to generate pulse charging current to charge an energy storage capacitor (17); when the energy storage voltage of the energy storage capacitor (17) rises to an abnormal detection set value, judging that the energy storage capacitor (17) is abnormal if the energy storage voltage added value of the energy storage capacitor (17) is not within the set value range according to an electrical formula dV/dt = I/C; if the energy storage voltage of the energy storage capacitor (17) cannot rise to the abnormal detection set value in the process, the abnormal function of the pulse switch charging circuit (10) or the abnormal disconnection of the energy storage capacitor (17) can be judged; under the condition that no abnormity is judged by the measurement, the single chip microcomputer system (1) compares the measured value and the set value of the energy storage voltage of the energy storage capacitor (17), and regulates the output of PWM1 and PWM2 pulse signals, so that the energy storage voltage of the energy storage capacitor (17) can be stabilized at the set value of the energy storage voltage, and the set value of the energy storage voltage can be any value below 450V.

After receiving a switching-on or switching-off request signal, the single chip microcomputer system (1) outputs a group of switching-on or switching-off control signals of CON1, CON2, CON3 and CON4 with set width, the switching-on (forward direction) or switching-off (reverse direction) bridge circuit of the bridge type driving circuit (8) is used for communicating the anode and the cathode of the energy storage capacitor (17) and two ends of the magnet exciting coil (16), and the energy storage capacitor (17) discharges in the forward direction or the reverse direction through the magnet exciting coil (16); the positive discharge current flows through the excitation coil (16) to generate a positive excitation magnetic field which is superposed with the magnetic field generated by the permanent magnet; under the action of the superimposed magnetic field, the movable iron core (armature) of the magnetic latching operating mechanism overcomes the external force and performs attraction motion to the static iron core, namely, positive closing motion is generated, and the closing operation process of a circuit breaker and a contactor of the magnetic latching mechanism is realized; after the switch-on operation, a discharging loop of the energy storage capacitor (17) and the excitation coil (16) is cut off, an excitation magnetic field disappears, a movable iron core attracted with a static iron core overcomes external force by virtue of attraction force generated by a permanent magnet magnetic field, and is kept in an attraction state, namely a switch-on state is kept; the reverse discharge current flows through the magnet exciting coil (16) to generate a reverse exciting magnetic field, the reverse exciting magnetic field counteracts a magnetic field generated by the permanent magnet, so that the attraction force between the static iron core and the movable iron core is reduced, and when the attraction force cannot overcome the external force, the movable iron core leaves the static iron core under the action of the external force to generate reverse brake-separating motion, namely the brake-separating operation process of a circuit breaker and a contactor of the magnetic latching mechanism; the electrical parameters of resistance, inductance value and capacitance of the excitation coil (16) and the like of the energy storage capacitor (17) are different, the discharging process of the energy storage capacitor (17) through the excitation coil (16) is also different, the pulse signal setting widths of CON1, CON2, CON3 and CON4 are adjusted, the excitation coil (16) and the energy storage capacitor (17) with different parameters can be adapted, and the process that the excitation coil (16) drives the movable iron core of the magnetic latching operating mechanism can be optimized; in the process of switching on or switching off, the single chip microcomputer system (1) monitors the change of the energy storage voltage of the energy storage capacitor (17) through the voltage measurement circuit (9) according to fixed time intervals, and the average discharge current flowing through the exciting coil (16) in each measurement time interval can be estimated according to the electrical formula I = CdV/dt; when the estimated discharge current exceeds a set protection value, the single chip microcomputer system (1) judges the abnormal state, enters abnormal protection processing, prevents the magnet retention operating mechanism from stopping a movable iron core, prevents the magnet exciting coil (16) from overcurrent due to the abnormal conditions such as turn-to-turn short circuit and the like of the magnet exciting coil (16), prevents the bridge type driving circuit (8) and the magnet exciting coil (16) from being damaged due to overcurrent, and has the function of system protection.

The power is supplied by AC 85V-AC 265V alternating current power supply or DC 24V-DC 48V direct current power supply, and the field power supply condition can be generally met. Under the emergency condition, the DC24V backup storage battery can meet the power supply requirement of the intelligent controller of the magnetic latching operating mechanism, and the magnetic latching operating mechanism is very convenient to use.

The intelligent controller of the magnetic latching operating mechanism has good applicability and anti-interference performance through actual measurement. The energy storage capacitor has high charging speed and high efficiency and is not influenced by the voltage fluctuation of the power supply. The core characteristics are as follows: the single chip microcomputer system is adopted for management, two PWM control signals are output, the pulse switch charging circuit is enabled to generate pulse charging current higher than the voltage of a power supply, the energy storage capacitor is charged, and the energy storage voltage of the energy storage capacitor is adjustable and controllable; the high-voltage power circuit and the low-voltage power circuit are effectively isolated by adopting isolation elements such as a distributed power supply, a relay, a transformer, an optocoupler and the like, so that the anti-interference performance of the intelligent controller circuit of the magnetic latching operating mechanism is improved; the emergency operation system has an alternating current power supply and a direct current power supply input conversion circuit, is more flexible to use, and particularly can realize emergency operation by using a 24V standby animal battery for power supply; the real-time clock and the EEPROM chip are adopted, so that system operation parameters and historical real-time event records can be stored; by adopting the Bluetooth communication module, the smart phone can set and inquire system operation parameters, real-time and historical real-time events and accumulated operation time through wireless communication; through an algorithm, the abnormal functions of a pulse switch charging circuit and an energy storage capacitor and the overcurrent protection in the drive process of the excitation coil are judged, and the safe work of the intelligent controller of the magnetic latching operating mechanism, a circuit breaker and a contactor under the abnormal condition can be ensured. The similar products formed by deleting the characteristics belong to the protection scope of the utility model without creation.

Claims

1. An intelligent controller of a magnetic latching operation mechanism is characterized by comprising a single chip microcomputer system (1), a DC distribution power supply (2), an operation display interface (3), a Bluetooth communication module (4), an RS485 communication interface (5), a clock circuit (6), an EEPROM (7), a bridge type driving circuit (8), a voltage measuring circuit (9), a pulse switch charging circuit (10), a switching power supply circuit (11), a DC-DC transformer inversion boosting circuit (12), a PFC circuit (13), a rectifying circuit (14), a diode D1, a D2, a D3, a D4, a capacitor C1 and a protective tube F1; the DC-DC transformer inversion boosting circuit (12) is connected to DC 24V-DC 48V direct current power supplies through a diode D1, and outputs DC400V direct current stabilized power supply through a diode D2; the PFC circuit (13) is connected with AC 85V-AC 265V alternating current power supplies through a rectifying circuit (14) and a protective tube F1, and outputs DC400V direct current stabilized power supply through a diode D3; the cathodes of the diodes D2 and D3 are combined and connected with the anode of the capacitor C1, the switching power supply circuit (11) and the pulse switch charging circuit (10); the switching power supply circuit (11) outputs +12V, +15V, -15V direct current power supplies, and then outputs direct current power supplies smaller than 6V through the DC distribution power supply (2), and the direct current power supplies are respectively connected with the functional circuits of all parts to provide working power supplies; the intelligent controller of the magnetic latching operating mechanism is connected with an energy storage capacitor (17), an excitation coil (16) of the magnetic latching operating mechanism, a DC 24-DC 48V direct current power supply or an AC 85V-AC 265V alternating current power supply to enter a working state; the singlechip system (1) is respectively connected with the EEPROM (7), the clock circuit (6), the RS485 communication interface (5), the Bluetooth communication module (4) and the operation display interface (3) through data communication interfaces; the voltage measuring circuit (9) is connected with the energy storage capacitor (17) and is connected with a voltage signal to be measured, and the voltage measuring circuit (9) outputs a signal to be measured related to the voltage of the energy storage capacitor (17) and is connected with the input port of the single chip microcomputer system (1); the pulse switch charging circuit (10) is connected with the energy storage capacitor (17) in series through a diode D4, the single chip microcomputer system (1) outputs two paths of PWM control signals to be connected with the pulse switch charging circuit (10), and the pulse switch charging circuit (10) controls a DC400V direct-current power supply to generate pulse charging current to charge the energy storage capacitor (17); the bridge type driving circuit (8) is respectively connected with the anode and the cathode of the energy storage capacitor (17) and two ends of the excitation coil (16), the singlechip system (1) outputs four control signals to be connected with the bridge type driving circuit (8), and the bridge type driving circuit (8) controls the energy storage capacitor (17) and the excitation coil (16) to be conducted through a forward bridge circuit or a reverse bridge circuit; the intelligent mobile phone (15) is in wireless connection with the intelligent controller of the magnetic latching operating mechanism through the Bluetooth communication module (4) to perform data exchange and switching on and off operations.

2. The intelligent controller of a magnetic latching operating mechanism according to claim 1, wherein the pulse switch charging circuit (10) is composed of a push-pull driving circuit (20), a pulse transformer T1, an optical coupler O2, MOS transistors Q1, Q2, diodes D5, D6, resistors R1-R5 and a capacitor C2; the turn ratio of the pulse transformer T1 is 1-5 times, and the optocoupler O2 uses a quick response switch optocoupler with push-pull output; the push-pull driving circuit (20) is respectively connected with a 12V power supply, a PWM1 input signal, a series circuit consisting of a capacitor C2 and a pulse transformer T1 primary coil, the pulse transformer T1 primary coil is connected with the 12V power supply, the output of a pulse transformer T1 secondary coil is connected with a grid electrode of a MOS tube Q1 and the cathode of a diode D5 after being subjected to voltage division through resistors R1 and R2, the source electrode of the MOS tube Q1 is connected with the other end of the resistor R2, the anode of a diode D5, the cathode of the diode D6 and a power inductor L1, the drain electrode of the MOS tube Q1 is connected with a DC400V power supply, and the anode of the diode D6 is grounded; the positive electrode of the input end of the optical coupler O2 is connected with a resistor R3 in series and a resistor R4 in parallel and then is connected with a PWM2 input signal; the output side of the optical coupler O2 is connected with a 15V power supply and a high-voltage end ground wire, the push-pull output port of the optical coupler O2 is connected with the grid electrode of an MOS tube Q2 through a resistor R5, the drain electrode of the MOS tube Q2 is connected with a power inductor L1 and the anode of a diode D4, and the source electrode is connected with the high-voltage end ground wire; when PWM1 and PWM2 pulse signals are input at high level synchronously, MOS tubes Q1 and Q2 are conducted simultaneously, a DC400V direct-current power supply is loaded to two ends of a power inductor L1, and current flows through the power inductor L1 to store energy; the PWM1 signal keeps high level, after the PWM2 signal is changed from high level to low level, the MOS tube Q1 is conducted, the Q2 is cut off, the direct current power supply outputs charging current through the MOS tube Q1, the power inductor L1 and the diode D4, meanwhile, the power inductor L1 releases stored energy through the diode D4 and the freewheeling diode D6, the current is output, the two currents are superposed, the charging current output higher than DC400V power supply voltage is generated, and the maximum charging current output is not more than twice of the direct current power supply voltage; resetting the PWM1 signal, when the PWM1 and the PWM2 signals are at low level at the same time, stopping outputting the charging current passing through the diode D4 when the stored energy of the power inductor L1 is completely released; the PWM1 and PWM2 signals with set duty ratio and width are continuously input, and the direct current power supply can generate continuous pulse charging current output through the pulse switch charging circuit (10).

3. The intelligent controller of the magnetic latching operating mechanism according to claim 1, wherein the voltage measuring circuit (9) is composed of a sampling amplifying circuit (19), an output amplifying circuit (18) and an optical coupler O1; the optical coupler O1 is a linear optical coupler and has a group of input signals and two groups of output signals; optical coupler O1 and sampling amplifier circuit (19) are connected +15V power and high voltage end ground, the positive pole of energy storage capacitor (17) is connected to sampling amplifier circuit (19) input, output signal connects optical coupler O1's input, a set of output of optical coupler O1 inserts sampling amplifier circuit (19) as feedback signal, the input of another set of output signal connection output amplifier circuit (18), output amplifier circuit (18) output voltage signal connection single chip microcomputer system (1) that awaits measuring, the voltage signal measurement value that awaits measuring is directly proportional to the actual voltage of energy storage capacitor (17).

4. The intelligent controller of a magnetic latching operating mechanism according to claim 1, characterized in that the bridge type driving circuit (8) is composed of IGBT 1-IGBT 4, a first IGBT driving circuit A (21), a second IGBT driving circuit A (22), a first IGBT driving circuit B (23), a second IGBT driving circuit B (24) and diodes D9, D10; the IGBT1, the IGBT2, the first IGBT drive circuit A (21) and the second IGBT drive circuit A (22) form a lower bridge circuit of the bridge drive circuit (8), the IGBT3, the IGBT4, the first IGBT drive circuit B (23) and the second IGBT drive circuit B (24) form an upper bridge circuit of the bridge drive circuit (8), an excitation coil (16) of the magnetic latching operating mechanism is connected in the middle of the bridge circuit, the positive electrode of an energy storage capacitor and a high-voltage end ground wire which are respectively connected with two ends of the upper bridge circuit and the lower bridge circuit of the bridge drive circuit (8) can be connected with the excitation coil (16) through the forward direction or the reverse direction of the bridge circuit, and the diodes D9 and D10 are respectively connected with the IGBT3 and the IGBT4 in; the IGBT driving circuit A is composed of an optical coupler O4, a diode D8, a resistor R10, an R11 and an R12, the optical coupler O4 is provided with a push-pull output port, the output side of the optical coupler O4 is connected with a + 15V-15V power supply, the push-pull output port of the optical coupler O4 is connected with a G pole of the IGBT after being connected with a resistor R12 in series, and the diode D8 is reversely connected with the R12 in parallel; an input port of the optical coupler O4 is sequentially connected with a resistor R10 and a parallel resistor R11 in series and then connected with a control signal of the singlechip system (1); the IGBT driving circuit B is composed of an optocoupler O3, triodes Q3, Q4, a diode D7, resistors R6-R9 and a capacitor C3, the triodes Q3 and Q4 respectively adopt NPN and PNP tubes to form a push-pull output circuit, a collector of the triode Q3 is connected with the diode D7 in series and then connected with a +15V power supply, a collector of the triode Q4 is connected with a resistor R8, a capacitor C3 and an E pole of the IGBT, emitters of the triodes Q3 and Q4 are connected with a G pole of the IGBT after being connected with the resistor R4 in series, an input end of the optocoupler O4 is connected with a control signal of the singlechip system (1) after being connected with the resistor R4 and the parallel resistor R4, a collector output by the optocoupler O4 is connected with the capacitor C4, a collector of the triode Q4 and a cathode of the diode D4, and an emitter output by the optocoupler.

5. The intelligent controller for the magnetic latching operating mechanism according to any one of claims 1 to 4, wherein a DC distribution power supply (2), isolation optocouplers O1, O2, O3 and O4 and a pulse transformer T1 are adopted to effectively isolate a low-voltage power supply working circuit from a high-voltage power supply working circuit, avoid mutual interference of internal circuits of the intelligent controller for the magnetic latching operating mechanism and ensure the stable operation of the single chip microcomputer system (1).

6. The intelligent controller of the magnetic latching operating mechanism according to claim 1, wherein the DC-DC power supply voltage output by the DC-DC transformer inverting booster circuit (12) and the PFC circuit (13) is not limited to 400V, and circuit parameters can be adjusted according to actual needs to be adjusted to the DC power supply output of different target voltages; the AC 85V-AC 265V alternating current power supply can be realized by using a BOOST circuit except that the DC400V is output through a PFC circuit (13) to stabilize the direct current power supply.

7. The intelligent controller for the magnetic latching operating mechanism is characterized in that the singlechip microcomputer system (1) is connected with a memory EEPROM (7) and a clock circuit (6), real-time can be read from the clock circuit (6), and system operation parameters, real-time event recording and accumulated operation time are accessed in the memory EEPROM (7) without losing power.

8. The intelligent controller of the magnetic latching operating mechanism according to claim 1, wherein the smart phone (15) is wirelessly connected with the Bluetooth communication module (4) through a standard Bluetooth communication protocol, the Bluetooth communication module (4) is connected with the single chip microcomputer system (1) through a UART communication interface, and the smart phone (15) can wirelessly communicate with the single chip microcomputer system (1) and perform online operation; working operation parameters and real-time of the single chip microcomputer system (1) can be set and inquired through the smart phone (15), and historical event records, accumulated operation times and operation time can be inquired.