CN210007403U

CN210007403U - elevator energy feedback circuit and device based on single chip microcomputer

Info

Publication number: CN210007403U
Application number: CN201920470685.4U
Authority: CN
Inventors: 周川; 姚明阳; 金丽丽; 黄斌
Original assignee: Liuzhou Railway Vocational Technical College
Current assignee: Liuzhou Railway Vocational Technical College
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2020-01-31
Anticipated expiration: 2029-04-09

Abstract

The utility model discloses an elevator energy repayment circuit based on singlechip connects between electric wire netting and elevator braking unit, elevator braking unit includes elevator converter and elevator hauler, the elevator converter includes rectifier module, direct current generating line and the contravariant module of electricity connection, the utility model discloses a super capacitor and storage battery are as mixing energy memory, through detecting the ascending or falling on the converter direct current generating line, use single chip microcomputer control super capacitor and storage battery to carry out charge-discharge operation to simplified control method.

Description

elevator energy feedback circuit and device based on single chip microcomputer

Technical Field

The utility model belongs to energy repayment research field, concretely relates to elevator energy repayment circuit and device based on singlechip.

Background

The elevator is taken as important high-efficiency transportation equipment of a high-rise building and gradually becomes second large electric equipment except an air conditioner, the establishment of an energy-saving society is vigorously advocated by the present country, more than 90% of the domestic elevators are non-energy-saving elevators, and the non-energy-saving elevators adopt an energy consumption braking mode, namely, the external braking resistor consumes electric energy, so that the braking resistor is rapidly heated, smokes and even emits red, the environmental temperature of a machine room is increased, and the normal operation of other equipment in the machine room can be influenced for a long time.

The energy feedback technology of the elevator mainly comprises three types, , a rectifier module of an elevator frequency converter adopts a controllable rectifier module to replace an uncontrollable rectifier module to realize bidirectional flow of energy, an inverter is connected in parallel to the direct current bus side of the frequency converter as independent units, and an external energy feedback device is used for returning the feedback energy to a power grid, and the third type adopts a feedback energy storage technology to store the feedback energy in energy storage elements such as a lithium ion battery or a super capacitor, and when an elevator tractor works in an electric state, the energy storage elements release energy so as to achieve the purpose of energy saving, and related patent documents are as follows:

1. 201220106528.3 patent number, utility model name elevator energy feedback device, the device includes positive power supply link, negative pole power supply link, charging circuit, energy storage capacitor, inverter circuit, high frequency high voltage ware and high frequency rectifier circuit, the device has simple structure, the reliability is high, low in manufacturing cost and energy do not have the harmonic pollution to the electric wire netting when directly repaying the electric wire netting.

2. 201620740979.0, the utility model discloses a isolated form elevator energy repayment device, the device includes preventing recharging diode (12), stabilizing capacitor C2 (7), three-phase bridge type full control contravariant module (8), three-phase battery module (9), ATSE automatic switching from compound type automatic change-over switch (10), wherein, stabilizing capacitor C2 (7) is connected with the direct current side of elevator converter (1) and the input of three-phase bridge type full control contravariant module (8), the output of three-phase bridge type full control contravariant module (8) is connected with the input (9) of three-phase battery module, ATSE automatic switching from compound type automatic change-over switch (10) power supply port with commonly used of three-phase battery module (9) is connected with the output of three-phase battery module (9), ATSE automatic switching from compound type automatic change-over switch (10) stand-by power source port with three-phase mains supply is connected to ordinary consumer (11) in the elevator car, the cost is realized to be lower, the higher technological effect of security, but the three-phase automatic switching from compound type automatic change-over switch (10) output port of automatic change-over switch (9) power supply switch (9) to ordinary consumer (9) of three-phase battery module, therefore the three-phase battery module is the three-phase battery module electric energy charging and the three-phase battery module is less than the electric energy of the emergency power supply device that the three-phase battery module used when the three-phase battery module is enough, therefore the three-phase battery module is enough that the emergency operation of elevator car, the three.

3. Patent numbers: 201220171629.9, utility model name: the device can directly use the electric energy fed back to the direct current bus to heat water when the elevator is in a power generation state, thereby realizing energy conservation. The device is characterized in that the feedback energy of the elevator is directly used for heating water, but in the normal working process of the elevator, the feedback energy can be generated only when the elevator is in a light load ascending state and in a heavy load descending state, so that the heating process of the device for heating water is intermittent, and the heating effect is poor.

4. Application No.: 201710608847.1, title of the invention: the technology adopts the super capacitor and the storage battery pack to perform hybrid energy storage on feedback energy of the elevator, controls an energy flow path, distributes the energy storage size of the hybrid energy storage device and optimizes a management structure of the feedback energy. Although the technology can effectively manage and utilize the elevator feedback energy, the technology needs to be combined with elevator traction control to estimate the elevator energy flow direction, and the control method is complex. In addition, after the super capacitor and the storage battery pack are fully charged, the elevator is still in a power generation state, the discharge circuit is started, and redundant energy is dissipated, so that part of energy is wasted.

5. 201110414092.4, the invention name is elevator braking energy repayment and control system based on super capacitor, this invention includes super capacitor energy storage module, two-way DC-DC converter, energy repayment control chip, hardware protection module, second hardware protection module, this invention is effective to protect super capacitor module, guarantees its constant voltage discharge, protects super capacitor module's safety.

Disclosure of Invention

The utility model aims at solving the technical problem, elevator energy repayment circuits and devices based on singlechip that can reduce electric wire netting harmonic pollution, control method is simple and have the emergent function of power failure are provided adopt super capacitor and storage battery as mixing energy memory, through detecting that the voltage pump rises or falls on the converter direct current bus, use single chip microcomputer control super capacitor and storage battery to carry out charge-discharge operation, thereby control method has been simplified, in addition, after detecting super capacitor and storage battery electric energy and being full of, the elevator is still at the power generation state, then can directly let in elevator repayment energy in three-phase IGBT contravariant bridge circuit, become alternating current electric energy feedback electric wire netting, thereby the waste of energy has been avoided, improve elevator repayment energy's utilization ratio.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

elevator energy feedback circuit based on singlechip is connected between electric wire netting and elevator braking unit, elevator braking unit includes elevator converter and elevator hauler, the elevator converter includes rectifier module, direct current bus and the contravariant module of electricity connection, the circuit still includes main circuit and control circuit, the main circuit includes:

the hybrid energy storage device stores and releases energy fed back by the elevator;

the bidirectional DC/DC conversion circuit realizes bidirectional flow of direct current electric energy and has a buck-boost bidirectional conversion function, wherein the end of the bidirectional DC/DC conversion circuit is connected with a direct current bus, and the end of the bidirectional DC/DC conversion circuit is connected with a hybrid energy storage device;

the three-phase IGBT inverter bridge circuit converts direct-current electric energy into alternating-current electric energy according to the driving signal and feeds the alternating-current electric energy back to the power grid to realize energy feedback, wherein the end of the three-phase IGBT inverter bridge circuit is connected with a direct-current bus, and the end of the three-phase IGBT inverter bridge circuit is connected with the power grid;

the control circuit includes:

the voltage detection circuit is used for detecting the voltage of the direct-current bus, detecting the voltage of the hybrid energy storage device and transmitting the voltage of the direct-current bus and the voltage of the hybrid energy storage device to the AD conversion circuit, wherein the end of the voltage detection circuit is respectively connected with the direct-current bus and the hybrid energy storage device, and the end of the voltage detection circuit is connected with the AD conversion circuit;

the AD conversion circuit is used for converting an analog signal of the voltage detection circuit into a digital signal and feeding back information to the single chip microcomputer control circuit by judging numerical conditions of the direct-current bus voltage and the voltage of the hybrid energy storage device, wherein the end of the AD conversion circuit is connected with the voltage detection circuit, and the end of the AD conversion circuit is connected with the single chip microcomputer control circuit;

the single chip microcomputer control circuit is used for controlling the attraction and the disconnection of the normally open contacts of each direct current contactor, controlling the PWM modulation circuit and controlling the SVPWM modulation circuit, the input end of the single chip microcomputer control circuit is connected with the AD conversion circuit, and the output end of the single chip microcomputer control circuit is connected with the PWM modulation circuit, the SVPWM modulation circuit and the coil of the direct current contactor;

the PWM modulation circuit is used for receiving a control signal from the single chip microcomputer and generating corresponding PWM waves so as to trigger the on and off of an IGBT (insulated gate bipolar translator) in the bidirectional DC/DC conversion circuit, wherein the end of the PWM modulation circuit is connected with the single chip microcomputer control circuit, and the end of the PWM modulation circuit is connected with the bidirectional DC/DC conversion circuit;

the direct current contactor is used for controlling the on-off of the direct current circuit and is respectively arranged on a connecting circuit of the bidirectional DC/DC conversion circuit, the three-phase IGBT inverter bridge circuit and the direct current bus;

and the SVPWM modulation circuit is used for receiving a control signal from the single chip microcomputer and generating corresponding SVPWM waves so as to trigger the on and off of the IGBTs in the three-phase IGBT inverter bridge circuit, wherein the end of the SVPWM modulation circuit is connected with the single chip microcomputer control circuit, and the end of the SVPWM modulation circuit is connected with the three-phase IGBT inverter bridge circuit.

As a technical scheme for a step , the bidirectional DC/DC conversion circuit comprises a bidirectional DC/DC conversion circuit 1 and a bidirectional DC/DC conversion circuit 2, the hybrid energy storage device comprises a super capacitor and a storage battery, a 1 end of the bidirectional DC/DC conversion circuit is connected with a direct-current bus, another end of the bidirectional DC/DC conversion circuit is connected with the super capacitor, a 2 end of the bidirectional DC/DC conversion circuit 2 is connected with the direct-current bus, and another end of the bidirectional DC/DC conversion circuit is connected with the storage battery.

As a technical scheme for steps, the bidirectional DC/DC conversion circuit 1 comprises 6 IGBTs, 6 diodes, 4 inductors, 3 resistors and 2 capacitors, every two of the 6 IGBTs form 3 bridge arms, an emitter of an upper bridge arm IGBT is connected with a collector of a lower bridge arm IGBT, 3 common collectors of the IGBTs of the upper bridge arm are connected, 3 common emitters of the IGBTs of the lower bridge arm are connected, each IGBT is connected with 1 diode in a reverse parallel mode, a common collector end is connected to a normally open contact of KM2 through inductors and then connected to a positive bus of a direct current bus through KM1, a common emitter end is directly connected to KM2 which is another normally open contact and then connected to a negative bus of the direct current bus through KM1, the capacitors are connected between the common collector end and the common emitter end, lines led out from IGBTs of each bridge arm are connected with resistors and resistors, the right ends of the 3 resistors are connected to a common emitter end, the common capacitor is connected to 369634 and connected to a super capacitor in parallel connection with two ends of the emitter end.

As a technical scheme for steps, the bidirectional DC/DC conversion circuit 2 comprises 6 IGBTs, 6 diodes, 4 inductors, 3 resistors and 2 capacitors, every two of the 6 IGBTs form 3 bridge arms, an emitter of an IGBT of an upper bridge arm is connected with a collector of an IGBT of a lower bridge arm, 3 IGBTs of the upper bridge arm are connected with a common collector, 3 IGBTs of the lower bridge arm are connected with a common emitter, each IGBT is connected with 1 diode in a reverse parallel mode, a common collector end is connected to a normally open contact of KM3 through inductors and then connected to a positive bus of a direct current bus through KM1, a common emitter end is directly connected to KM3 which is another normally open contact and then connected to a negative bus of the direct current bus through KM1, the capacitors are connected between the common collector end and the common emitter end, and resistors are led out from lines between the IGBTs of each bridge arm, the right ends of the 3 resistors are connected to a common emitter end of a common terminal, the 36 capacitors are connected to a common emitter end of a storage battery, and the common emitter end of the is connected to the other emitter end.

, the voltage detection circuit includes a voltage detection circuit 1, a voltage detection circuit 2 and a voltage detection circuit 3, the AD conversion circuit includes an AD conversion circuit 1, an AD conversion circuit 2 and an AD conversion circuit 3, the voltage detection circuit 1 is connected to the dc bus, the AD conversion circuit 1 is connected to another 0, the AD conversion circuit 1 1 is connected to the voltage detection circuit 1, the other 2 is connected to the input of the mcu control circuit, the voltage detection circuit 2 is connected to the super capacitor, the other is connected to the AD conversion circuit 2, the AD conversion circuit 2 is connected to the voltage detection circuit 2, the other is connected to the input of the mcu control circuit, the voltage detection circuit 3 is connected to the battery, the other is connected to the AD conversion circuit 3, the AD conversion circuit 3 is connected to the voltage detection circuit 3, and the other is connected to the input of the mcu control circuit.

The technical scheme of the step is that the direct current contactor comprises direct current contactors numbered KM1, KM2, KM3 and KM4, wherein a KM1 end is connected with a direct current bus, another end is respectively connected with KM2, KM3 and KM4, a end of KM2 is connected with KM1, another end is connected with a bidirectional DC/DC conversion circuit 1, a end of KM3 is connected with KM1, another end is connected with a bidirectional DC/DC conversion circuit 2, a end of KM4 is connected with KM1, and another end is connected with a three-phase IGBT inverter bridge circuit.

As the technical scheme of the step, the singlechip adopts an STM32 singlechip.

elevator energy feedback device based on singlechip, the elevator energy feedback device includes as above elevator energy feedback circuit.

The utility model discloses each circuit module's effect does:

1. bidirectional DC/DC conversion circuit

When the voltage of the direct current bus drops, the super capacitor or the storage battery pack can discharge to the direct current bus through the bidirectional DC/DC conversion circuit.

2. Three-phase IGBT inverter bridge circuit

When the super capacitor and the storage battery pack are fully charged and the elevator traction machine is still in a power generation state, the connecting switch of the super capacitor and the storage battery pack is disconnected, the connecting switch of the three-phase IGBT inverter bridge circuit and the direct-current bus is closed, and at the moment, the three-phase IGBT inverter bridge circuit can invert direct-current electric energy fed back by the elevator into three-phase alternating-current electric energy and returns the three-phase alternating-current electric energy to the power grid.

3. Voltage detection circuit

The voltage detection circuit comprises three voltage detection circuits, wherein the end 1 of the voltage detection circuit is connected with a direct current bus and used for detecting the voltage of the direct current bus, the end of the voltage detection circuit is connected with an AD conversion circuit 1 and transmits the voltage of the direct current bus to the AD conversion circuit 1, the end 2 of the voltage detection circuit is connected with a super capacitor and used for detecting the voltage of the end of the super capacitor, the end of the voltage detection circuit is connected with the AD conversion circuit 2 and transmits the voltage of the end of the super capacitor to the AD conversion circuit 2, the end 3 of the voltage detection circuit is connected with a storage battery and used for the voltage of the storage battery, the end of the voltage detection circuit is connected with.

4. AD conversion circuit

The AD conversion circuit 1 is used for judging whether the direct-current bus voltage is in a normal range, when the bus voltage is higher than an upper limit value or lower than a lower limit value, the AD conversion circuit 1 inputs a high level to the singlechip control circuit, otherwise, a low level is input, the AD conversion circuit 2 is used for judging whether the voltage of the super capacitor is in the normal range, when the voltage of the super capacitor is higher than the upper limit value, the super capacitor is fully charged, the AD conversion circuit 2 supplies the singlechip control circuit with the high level, otherwise, the low level is input, the AD conversion circuit 3 is used for judging whether the voltage of the storage battery pack is in the normal range, when the voltage of the storage battery pack is higher than the upper limit value, the storage battery pack is fully charged, the AD conversion circuit 3 supplies the singlechip control circuit with the high level, and otherwise, the low level is input.

5. Singlechip control circuit

The input end of the singlechip control circuit is connected with three AD conversion circuits, and the output end of the singlechip control circuit is connected with a PWM (pulse-width modulation) circuit, an SVPWM (space vector pulse-width modulation) circuit and coils of four direct current contactors. The single chip microcomputer control circuit is used for processing the logical relation of the elevator energy feedback device, so that the actuation and the disconnection of normally open contacts of all contactors are controlled, the PWM modulation circuit is controlled to generate required PWM waves, the charging and discharging of the super capacitor and the storage battery pack are realized, the SVPWM modulation circuit is controlled to generate the required PWM waves, and the electric energy conversion of the three-phase IGBT inverter bridge circuit is realized.

6. PWM modulation circuit and SVPWM modulation circuit

The end of the PWM modulation circuit is connected with the singlechip control circuit, the other end of the PWM modulation circuit is connected with the bidirectional DC/DC conversion circuit and is used for receiving a control signal from the singlechip and generating corresponding PWM waves so as to trigger the connection and disconnection of the end of the IGBT.SVPWM modulation circuit in the bidirectional DC/DC conversion circuit to be connected with the singlechip control circuit, and the other end of the PWM modulation circuit is connected with the three-phase IGBT inverter bridge circuit and is used for receiving the control signal from the singlechip and generating corresponding SVPWM waves so as to trigger the connection and disconnection of the IGBT in the three-phase IGBT inverter bridge circuit.

The main working principle of the elevator energy feedback device is as follows:

1. when the voltage of the direct current bus is higher than the upper limit value, whether the voltage of the super capacitor terminal is higher than the upper limit value is judged. If the voltage of the end of the super capacitor is within a normal range, the single chip microcomputer controls the direct current contactor KM1 and the coil KM2 to be electrified, so that normally open contacts of KM1 and KM2 are attracted, and controls a PWM modulation circuit to generate corresponding PWM waves, so that a direct current bus can charge the super capacitor through the bidirectional DC/DC conversion circuit 1.

2. And if the voltage at the end of the super capacitor is higher than the upper limit value, judging whether the voltage at the end of the storage battery pack is higher than the upper limit value. If the voltage of the end of the storage battery is in a normal range, the singlechip controls the coils of the contactor KM1 and KM3 to be electrified, so that normally open contacts of KM1 and KM3 are attracted, and controls the PWM modulation circuit to generate corresponding PWM waves, so that the direct-current bus can charge the storage battery through the bidirectional DC/DC conversion circuit.

3. If the voltage at the end of the storage battery pack is higher than the upper limit value, the single chip microcomputer controls coils of the contactor KM1 and the contactor KM4 to be electrified, so that normally open contacts of KM1 and KM4 are attracted, and the SVPWM modulation circuit is controlled to generate corresponding SVPWM waves, so that regenerated direct current electric energy on a direct current bus can be converted into three-phase alternating current electric energy with the same frequency as a power grid through the three-phase IGBT inverter bridge circuit, and the three-phase alternating current electric energy is returned to the power.

4. When the voltage of the direct-current bus is lower than the lower limit value, the single chip microcomputer firstly controls the coils of the contactor KM1 and the contactor KM2 to be electrified, so that normally open contacts of KM1 and KM2 are attracted, and controls the PWM modulation circuit to generate corresponding PWM waves, so that the super capacitor can charge the direct-current bus through the bidirectional DC/DC conversion circuit 1. If the electric energy of the super capacitor is completely discharged and the voltage of the direct-current bus is still lower than the lower limit value, the single chip microcomputer controls the coil of the contactor KM2 to lose power and the coil of the contactor KM3 to get power, so that the normally open contact of the KM2 is disconnected and the normally open contact of the KM3 is closed, and therefore the storage battery pack charges the direct-current bus through the bidirectional DC/DC conversion circuit 2.

5. When the voltage of the direct-current bus is within a normal range, the single chip microcomputer controls all the contactor coils to lose power, and the normally open contacts of all the contactors are in an off state.

The utility model discloses in, three-phase IGBT inverter bridge circuit, AD converting circuit, voltage detection circuit, PWM modulation circuit and SVPWM modulation circuit are conventional circuit, consequently do not carry out detailed circuit diagram description.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a two-way DC converting circuit adopts the reversible chopper circuit of triple three phase current, this circuit is by 6 IGBT, 6 diodes, 4 inductances, 3 resistances and 2 electric capacity are constituteed, can realize ultracapacitor system and storage battery's charge-discharge function, in addition, adopt the reversible chopper circuit of triple three phase current to make the total weight of smoothing reactor very alleviate, direct current bus side and mixed energy memory side all possess LC filtering action.

2. The utility model discloses a control of three-phase IGBT inverter bridge circuit adopts space vector PWM control technique (SVPWM). In the control of the ac motor, the final purpose is not to make the output voltage sinusoidal, but to make the flux linkage of the motor a circular rotating magnetic field, thereby causing the motor to generate a constant electromagnetic torque. SVPWM mainly realizes the reasonable control to three-phase IGBT inverter bridge circuit according to space voltage vector conversion, and this kind of control mode can effectively improve inverter circuit to the utilization ratio of direct current voltage to and reduce the harmonic, thereby reduce the harmonic pollution of electric wire netting.

3. The utility model discloses an elevator energy feedback device adopts the singlechip to carry out entire system's logical operation and control, designs the singlechip procedure, realizes functions such as system to storage, transform and management of elevator regeneration energy. In addition, the elevator energy feedback device adopts two methods of energy storage technology and energy feedback technology to manage the regenerated energy of the elevator, the energy is stored in the super capacitor preferentially and then stored in the storage battery pack, the redundant energy is finally returned to the power grid through the three-phase IGBT inverter bridge circuit, the energy of the super capacitor is released preferentially when the energy is released, and then the energy of the storage battery pack is released.

4. The utility model discloses an elevator energy feedback device possesses the emergent function of having a power failure, when the power failure accident takes place, can release the energy in ultracapacitor system and the storage battery, makes the elevator flat bed nearby, releases the passenger in the car, reduces the emergence of elevator accident.

Drawings

Fig. 1 is a general structure diagram of elevator energy feedback circuits based on single chip microcomputer;

fig. 2 is a circuit diagram of the bidirectional DC/DC conversion circuit of the present invention;

fig. 3 is a circuit diagram of the AD conversion circuit of the present invention.

Reference numerals: 1-power grid, 2-elevator frequency converter, 2.1-rectifier module, 2.2-direct current bus, 2.3-inverter module, 3-elevator traction machine, 4-super capacitor, 5-bidirectional DC/DC conversion circuit 1, 6-voltage detection circuit 1, 7-three-phase IGBT inverter bridge circuit, 8-SVPWM modulation circuit, 9-AD conversion circuit 1, 10-single chip microcomputer control circuit, 11-PWM modulation circuit, 12-AD conversion circuit 2, 13-AD conversion circuit 3, 14-bidirectional DC/DC conversion circuit 2, 15-storage battery, 16-voltage detection circuit 2, 17-voltage detection circuit 3;

v1, V2, V3, V4, V5, V6-IGBT (insulated gate bipolar transistor);

VD1, VD2, VD3, VD4, VD5 and VD 6-diodes;

l1, L2, L3, L4-inductors;

r1, R2, R3-resistors;

c1, C2-capacitance.

Detailed Description

The present invention will be described in further detail in with reference to examples, but the embodiments of the present invention are not limited to the scope of the examples.

elevator energy feedback circuit based on singlechip is connected between electric wire netting 1 and elevator braking unit, and elevator braking unit includes elevator converter 2 and elevator hauler 3, and rectifier module 2.1, direct current bus 2.2 and the contravariant module 2.3 of electricity connection are drawn together to elevator converter 2, and the circuit still includes main circuit and control circuit, and the main circuit includes:

the bidirectional DC/DC conversion circuit realizes bidirectional flow of direct current electric energy and has a buck-boost bidirectional conversion function, wherein the end of the bidirectional DC/DC conversion circuit is connected with a direct current bus 2.2, and the end of the bidirectional DC/DC conversion circuit is connected with a hybrid energy storage device;

the three-phase IGBT inverter bridge circuit 7 converts direct-current electric energy into alternating-current electric energy according to the driving signal and feeds the alternating-current electric energy back to the power grid 1 to realize energy feedback, wherein the 7 end of the three-phase IGBT inverter bridge circuit 7 is connected with a direct-current bus 2.2, and the end of the three-phase IGBT inverter bridge circuit is connected with the power grid 1;

the control circuit includes:

the voltage detection circuit is used for detecting the voltage of the direct-current bus 2.2, detecting the voltage of the hybrid energy storage device and transmitting the voltage of the direct-current bus 2.2 and the voltage of the hybrid energy storage device to the AD conversion circuit, the end of the voltage detection circuit is respectively connected with the direct-current bus 2.2 and the hybrid energy storage device, and the end of the voltage detection circuit is connected with the AD conversion circuit;

the AD conversion circuit is used for converting an analog signal of the voltage detection circuit into a digital signal and feeding back information to the single chip microcomputer control circuit by judging numerical conditions of the voltage of the direct current bus 2.2 and the voltage of the hybrid energy storage device, wherein the end of the AD conversion circuit is connected with the voltage detection circuit, and the end of the AD conversion circuit is connected with the single chip microcomputer control circuit 10;

the single-chip microcomputer control circuit 10 is used for controlling the attraction and the disconnection of the normally open contacts of each direct current contactor, controlling the PWM modulation circuit 11 and controlling the SVPWM modulation circuit 8, the input end of the single-chip microcomputer control circuit 10 is connected with the AD conversion circuit, and the output end of the single-chip microcomputer control circuit is connected with the PWM modulation circuit 11, the SVPWM modulation circuit 8 and the coil of the direct current contactor;

the PWM modulation circuit 11 is used for receiving a control signal from the single chip microcomputer and generating corresponding PWM waves so as to trigger the on and off of an IGBT in the bidirectional DC/DC conversion circuit, wherein the end of the PWM modulation circuit 11 is connected with the single chip microcomputer control circuit 10, and the end is connected with the bidirectional DC/DC conversion circuit;

the direct current contactor is used for controlling the on-off of the direct current circuit and is respectively arranged on a connecting circuit of the bidirectional DC/DC conversion circuit, the three-phase IGBT inverter bridge circuit 7 and the direct current bus 2.2;

and the SVPWM modulation circuit 118 is used for receiving a control signal from the single chip microcomputer and generating corresponding SVPWM waves so as to trigger the on and off of the IGBTs in the three-phase IGBT inverter bridge circuit 7, wherein the end of the SVPWM modulation circuit 11 is connected with the single chip microcomputer control circuit 10, and the end is connected with the three-phase IGBT inverter bridge circuit 7.

The bidirectional DC/DC conversion circuit comprises a bidirectional DC/DC conversion circuit 15 and a bidirectional DC/DC conversion circuit 214, the hybrid energy storage device comprises a super capacitor 4 and a storage battery 15, the end of the bidirectional DC/DC conversion circuit 15 is connected with a direct current bus 2.2, the other end is connected with the super capacitor 4, the end 214 of the bidirectional DC/DC conversion circuit is connected with the direct current bus 2.2, and the other end is connected with the storage battery 15.

The bidirectional DC/DC conversion circuit 1 comprises 6 IGBTs (V, V), 6 diodes (VD, VD), 4 inductors (L, L), 3 resistors (R, R) and 2 capacitors (C, C), wherein every two of the 6 IGBTs are connected to form 3 bridge arms, emitting electrodes of the upper bridge arms IGBT V, V and V are connected with collecting electrodes of the lower bridge arms V, V and V, 3 IGBT V, V common collecting electrodes of the upper bridge arms are connected, 3 IGBT V, V and V common emitting electrodes of the lower bridge arms are connected, each IGBT is reversely connected with 1 diode in parallel, the common collecting electrode end is connected to a contact of a KM through an inductor L and then connected to a positive bus of a direct current bus 2.2 through KM, the common emitting electrode end is directly connected to another normally open contact of KM, the common emitting electrode end is connected to another normally open bus of direct current bus 2.2 through KM, 1 capacitor C is connected between the common collecting electrode end and the emitting end of the common collecting electrode, the common resistor of each emitter and the R common capacitor are connected to another capacitor, and the R capacitor, R and R are connected to another capacitor, and R are connected to another capacitor in parallel with another capacitor.

The bidirectional DC/DC conversion circuit 1 comprises 6 IGBTs (V, V), 6 diodes (VD, VD), 4 inductors (L, L), 3 resistors (R, R) and 2 capacitors (C, C), wherein every two of the 6 IGBTs are connected to form 3 bridge arms, emitting electrodes of the upper bridge arms IGBT V, V and V are connected with collecting electrodes of the lower bridge arms V, V and V, common collecting electrodes of the 3 IGBTs V, V and V of the upper bridge arms are connected, common emitting electrodes of the 3 IGBTs V, V and V of the lower bridge arms are connected with the emitting electrodes of the upper bridge arms V, V and V in parallel, each IGBT is reversely connected with 1 diode in parallel, common collecting electrode ends are connected to a contact of a KM through an inductor L and then connected to a positive bus of a direct current bus 2.2 through KM, common emitting electrode ends are directly connected to another 0 normally open contact, and then connected to a negative bus of the direct current 2.2 through KM, wherein 1 capacitor C is connected between the common emitting electrode ends of the emitting electrodes and the common emitting electrodes of the R and the R, and the R are connected to another capacitor, and the capacitor of the other capacitor, and the capacitor is connected to a capacitor, and connected to a capacitor of the common emitting electrode of the capacitor of the other capacitor.

The voltage detection circuit comprises a voltage detection circuit 16, a voltage detection circuit 216 and a voltage detection circuit 317, wherein the AD conversion circuit comprises an AD conversion circuit 19, an AD conversion circuit 212 and an AD conversion circuit 313, the end 16 of the voltage detection circuit 16 is connected with a direct current bus 2.2, the end is connected with the AD conversion circuit 19, the end 19 0 of the AD conversion circuit 19 is connected with the voltage detection circuit 16, the end 1 is connected with the input end of the single chip microcomputer control circuit 10, the end 216 of the voltage detection circuit 216 is connected with the super capacitor 4, the end is connected with the AD conversion circuit 212, the end 212 of the AD conversion circuit 212 is connected with the voltage detection circuit 216, the end is connected with the input end of the single chip microcomputer control circuit 10, the end 317 is connected with the storage battery 15, the end is connected with the AD conversion circuit 313, the end 313 of the AD conversion circuit is connected with the voltage detection circuit 317, and the end is connected with the.

The singlechip adopts an STM32 singlechip.

The direct current contactor comprises direct current contactors numbered as KM1, KM2, KM3 and KM4, wherein the end of KM1 is connected with a direct current bus 2.2, the other end of is respectively connected with KM2, KM3 and KM4, the end of of KM2 is connected with KM1, the other end of is connected with a bidirectional DC/DC conversion circuit 15, the end of of KM3 is connected with KM1, the other end of is connected with the bidirectional DC/DC conversion circuit 214, the end of of KM4 is connected with KM1, and the other end of is connected with a three-phase IGBT inversion bridge.

The implementation mode is as follows:

1. the voltage detection circuit 16 passes the detected voltage of the dc bus 2.2 to the AD conversion circuit 19, and the AD conversion circuit 19 compares the voltage with the bus voltage upper limit value and the bus voltage lower limit value. If the voltage is higher than the upper limit value, the AD conversion circuit 19 sends a high level to the port 1 of the single chip microcomputer control circuit 10, otherwise sends a low level; if the voltage is lower than the lower limit value, the AD conversion circuit 19 transmits a high level to the port 2 of the one-chip microcomputer control circuit 10, otherwise, transmits a low level.

2. The voltage detection circuit 216 transfers the detected supercapacitor-4 terminal voltage to the AD conversion circuit 212, and the AD conversion circuit 212 compares the voltage with the supercapacitor-4 device voltage upper limit value and the supercapacitor-4 device lower limit value. If the voltage is higher than the upper limit value or lower than the lower limit value, the AD conversion circuit 212 transmits a high level to the port 3 of the one-chip microcomputer control circuit 10, otherwise transmits a low level. If the voltage is lower than the lower limit value, the AD conversion circuit 212 transmits a high level to the port 4 of the one-chip microcomputer control circuit 10, otherwise transmits a low level.

3. The voltage detection circuit 317 transmits the detected voltage across the group of secondary batteries 15 to the AD conversion circuit 313, and the AD conversion circuit 212 compares the voltage with the upper limit value of the group voltage of the secondary batteries 15 and the lower limit value of the group voltage of the secondary batteries 15. If the voltage is higher than the upper limit value or lower than the lower limit value, the AD conversion circuit 313 transmits a high level to the port 5 of the one-chip microcomputer control circuit 10, otherwise transmits a low level. If the voltage is lower than the lower limit value, the AD conversion circuit 313 transmits a high level to the port 6 of the one-chip microcomputer control circuit 10, otherwise transmits a low level.

4. When the single chip microcomputer judges that the port 1 is at a high level, entering a charging program; when the port 2 is at high level, entering a discharging program; when the port 1 and the port 2 are simultaneously at low level, the disconnection procedure is entered.

5. The charging program includes a charging program 1, a charging program 2, and a charging program 3. The single chip microcomputer judges that the port 3 is at a low level, and then enters a charging program 1; if the port 3 is at a high level, the level of the port 5 is judged, and if the port 5 is at a low level, the charging program 2 is entered; the port 5 is high and the charging process 3 is entered.

6. Charging procedure 1: the ports 6 and 7 of the single chip microcomputer output high levels, so that the KM1 coil and the MK2 coil are electrified, and the normally open contacts of the KM1 coil and the MK2 coil are attracted. Meanwhile, the port 10 outputs high level, so that the PWM wave generated by the PWM modulation circuit 11 triggers and turns on V1, V3 and V5 in the bidirectional DC/DC conversion circuit 15. At this time, the dc bus 2.2 charges the super capacitor 4.

7. Charging program 2: the ports 6 and 8 of the single chip microcomputer output high levels, so that the KM1 coil and the MK3 coil are electrified, and the normally open contacts of the KM1 coil and the MK3 coil are attracted. Meanwhile, the port 10 outputs high level, so that the PWM wave generated by the PWM modulation circuit 11 triggers and turns on V1, V3 and V5 in the bidirectional DC/DC conversion circuit 214. At this time, the dc bus 2.2 charges the battery 15 group.

8. Charging program 3: the ports 6 and 9 of the single chip microcomputer output high levels, so that the KM1 coil and the MK4 coil are electrified, and the normally open contacts of the KM1 coil and the MK4 coil are attracted. Meanwhile, the port 11 outputs high level, so that the SVPWM wave generated by the SVPWM modulation circuit 11 triggers and conducts the three-phase IGBT inverter bridge circuit 7. At this time, the dc power of the dc bus 2.2 is converted into three-phase ac power and returned to the grid 1.

9. The discharge program includes a discharge program 1 and a discharge program 2. The single chip microcomputer judges the level of the port 4, and if the port 4 is at a low level, the single chip microcomputer enters a discharging program 1; if the port 4 is at high level, the level of the port 6 is determined, and if the port 6 is at low level, the discharging procedure 2 is performed.

10. Discharge procedure 1: the ports 6 and 7 of the single chip microcomputer output high levels, so that the KM1 coil and the MK2 coil are electrified, and the normally open contacts of the KM1 coil and the MK2 coil are attracted. Meanwhile, the port 10 outputs low level, so that the PWM wave generated by the PWM modulation circuit 11 triggers and turns on V2, V4 and V6 in the bidirectional DC/DC conversion circuit 15. At this time, the super capacitor 4 discharges to the dc bus 2.2.

11. Discharge program 2: the ports 6 and 8 of the single chip microcomputer output high levels, so that the KM1 coil and the MK3 coil are electrified, and the normally open contacts of the KM1 coil and the MK3 coil are attracted. Meanwhile, the port 10 outputs low level, so that the PWM wave generated by the PWM modulation circuit 11 triggers and turns on V2, V4 and V6 in the bidirectional DC/DC conversion circuit 214. At this time, the battery 15 group discharges to the dc bus 2.2.

12. And (3) cutting off program: the

ports

6, 7, 8 and 9 of the single chip microcomputer output low levels, so that the KM1, MK2, MK3 and MK4 coils are powered off, and normally open contacts of the coils are in an open state.

elevator energy feedback device based on singlechip, the elevator energy feedback device includes above elevator energy feedback circuit.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the scope of the invention.

The equipment connection mode not described in detail in the utility model is understood according to the conventional connection mode in the field.

Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it. 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 technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1, kind of elevator energy feedback circuit based on singlechip, connect between electric wire netting and elevator braking unit, elevator braking unit includes elevator converter and elevator hauler, the elevator converter includes rectifier module, direct current bus and the contravariant module of electricity connection, its characterized in that, the circuit still includes main circuit and control circuit, the main circuit includes:

the control circuit includes:

2. The elevator energy feedback circuit based on single chip microcomputer according to claim 1, wherein the bidirectional DC/DC conversion circuit comprises a bidirectional DC/DC conversion circuit 1 and a bidirectional DC/DC conversion circuit 2, the hybrid energy storage device comprises a super capacitor and a storage battery, the end 1 of the bidirectional DC/DC conversion circuit is connected with a DC bus, the other end of the bidirectional DC/DC conversion circuit is connected with the super capacitor, the end 2 of the bidirectional DC/DC conversion circuit 2 is connected with the DC bus, and the other end of the bidirectional DC/DC conversion circuit is connected with the storage battery.

3. The single-chip microcomputer-based elevator energy feedback circuit as claimed in claim 2, wherein the DC contactors include DC contactors numbered KM1, KM2, KM3 and KM4, the KM1 end is connected to a DC bus, the other end is connected to KM2, KM3 and KM4, the KM2 end is connected to KM1, the other end is connected to the bidirectional DC/DC conversion circuit 1, the KM3 end is connected to end of KM1, the other end is connected to the bidirectional DC/DC conversion circuit 2, the KM4 end is connected to end of KM1, and the other end is connected to the three-phase IGBT inverter bridge circuit.

4. The elevator energy feedback circuit based on the single chip microcomputer according to claim 3 is characterized in that the bidirectional DC/DC conversion circuit 1 is composed of 6 IGBTs, 6 diodes, 4 inductors, 3 resistors and 2 capacitors, every two of the 6 IGBTs are connected to form 3 bridge arms, an emitter of the IGBT of the upper bridge arm is connected with a collector of the IGBT of the lower bridge arm, 3 IGBT common collectors of the upper bridge arm are connected, 3 IGBT common emitters of the lower bridge arm are connected, each IGBT is reversely connected with 1 diode in parallel, a common collector end is connected to a normally open contact of KM2 through inductors and then connected to a positive bus of a direct current bus through KM1, a common emitter end is directly connected to another normally open contacts of KM 25 and then connected to a negative bus of the direct current bus through KM1, capacitors are connected between the common collector end and the common emitter end, wires are led out between the IGBTs of each bridge arm to connect 85 inductors and , 3 resistors form another common emitter end, the right ends of the resistors and the common capacitors are connected to 369638, and the common emitter ends of the common capacitors are connected to 3638 and the 3638.

5. The elevator energy feedback circuit based on the single chip microcomputer according to claim 3 is characterized in that the bidirectional DC/DC conversion circuit 2 is composed of 6 IGBTs, 6 diodes, 4 inductors, 3 resistors and 2 capacitors, every two of the 6 IGBTs are connected to form 3 bridge arms, an emitter of the IGBT of the upper bridge arm is connected with a collector of the IGBT of the lower bridge arm, 3 IGBTs of the upper bridge arm are connected with a common collector, 3 IGBTs of the lower bridge arm are connected with a common emitter, each IGBT is connected with 1 diode in a reverse parallel mode, a common collector end is connected to a normally open contact of KM3 through inductors and then connected to a positive bus of a direct current bus through KM1, a common emitter end is directly connected to another normally open contacts of KM 25 and then connected to a negative bus of the direct current bus through KM1, capacitors are connected between the common collector end and the common emitter end, wires are led out between the IGBTs of each bridge arm and connected with 85 inductors and , 3 resistors form another common emitter end, the right ends of the resistors, the common emitter end is connected to the 3638 and connected to the common emitter end of the 3638, and the common emitter end of the storage battery is connected to another 3638.

6. The elevator energy feedback circuit based on single chip microcomputer according to claim 2, wherein the voltage detection circuit comprises a voltage detection circuit 1, a voltage detection circuit 2 and a voltage detection circuit 3, the AD conversion circuit comprises an AD conversion circuit 1, an AD conversion circuit 2 and an AD conversion circuit 3, the voltage detection circuit 1 is connected with a DC bus, the AD conversion circuit 1 is connected with the other 0, the AD conversion circuit 1 1 is connected with the voltage detection circuit 1, the other 2 is connected with the input end of the single chip microcomputer control circuit, the voltage detection circuit 2 is connected with a super capacitor, the other is connected with the AD conversion circuit 2, the AD conversion circuit 2 is connected with the voltage detection circuit 2, the other is connected with the input end of the single chip microcomputer control circuit, the voltage detection circuit 3 is connected with a storage battery, the other is connected with the AD conversion circuit 3, the AD conversion circuit 3 is connected with the voltage detection circuit 3, and the other is connected with the input end of the single chip microcomputer control circuit.

7. The kind of singlechip-based elevator energy feedback circuit of claim 1, wherein the singlechip is SMT32 singlechip.

8, elevator energy feedback device based on singlechip, characterized in that the elevator energy feedback device includes the elevator energy feedback circuit of any of claims 1-7.