Electronic star sealing circuit and system and elevator

Abstract

The utility model discloses an electronic star sealing circuit and system and an elevator. The electronic star sealing circuit comprises an optocoupler driving module, a voltage conversion module and a star sealing module. The optocoupler driving module and the star sealing module are connected with the voltage conversion module; the star sealing module is used for connecting a three-phase motor; wherein the star sealing module comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor and a sixth transistor. The space occupied by the elevator system can be reduced, the response speed is increased, and manpower and material resources are saved. The circuit can be widely applied to the technical field of electronic circuits.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to an electronic star-sealing circuit, system and elevator. Background Art

[0002] In today's elevator control systems, a star-sealing contactor is usually used to achieve star sealing, that is, the three phases of the motor UVW are short-circuited by the star-sealing contactor to limit the falling speed of the car, thereby ensuring the safety of the passengers. When using a star-sealing contactor to achieve the star-sealing function, a main contactor must also be used in conjunction. However, this type of elevator system that uses a star-sealing contactor to achieve star sealing requires the use of a main contactor, which occupies a large space and has relatively complicated contactor wiring. Moreover, the response time of using a star-sealing contactor and a main contactor to achieve star sealing is too long, which is not conducive to rapid star sealing in the absence of mains power and limiting the falling speed of the car. Therefore, there are still technical problems that need to be solved in the relevant technology. Utility Model Content

[0003] The purpose of this application is to solve one of the technical problems existing in the prior art to at least a certain extent.

[0004] To this end, an object of an embodiment of the present application is to provide an electronic star-sealing circuit, system and elevator, wherein the electronic star-sealing circuit can reduce the space occupied by the elevator system, improve the response speed and save manpower and material resources.

[0005] In order to achieve the above technical objectives, the technical solution adopted in the embodiment of the present application includes: an optical coupling driving module, a voltage conversion module and a star sealing module; the optical coupling driving module and the star sealing module are connected to the voltage conversion module; the star sealing module is used to connect a three-phase motor;

[0006] Wherein, the star-sealing module includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor and a sixth transistor; the collector of the first transistor, the collector of the second transistor and the collector of the third transistor are connected to the positive electrode of the DC bus; the emitter of the first transistor and the collector of the fourth transistor are connected to the first input end of the three-phase motor; the emitter of the second transistor and the collector of the fifth transistor are connected to the second input end of the three-phase motor; the emitter of the third transistor and the collector of the sixth transistor are connected to the third input end of the three-phase motor; the gate of the fourth transistor, the gate of the fifth transistor and the gate of the sixth transistor are connected to the voltage conversion module; the emitter of the fourth transistor, the emitter of the fifth transistor and the emitter of the sixth transistor are connected to the negative electrode of the DC bus; the emitter of the fourth transistor, the emitter of the fifth transistor and the emitter of the sixth transistor are all grounded.

[0007] In addition, the electronic star sealing circuit according to the above embodiment of the utility model may also have the following additional technical features:

[0008] Furthermore, in an embodiment of the present application, the circuit also includes a release power supply; the release power supply is used to provide power for the optocoupler driving module and the voltage conversion module.

[0009] Further, in the embodiment of the present application, the voltage conversion module includes: an eighth resistor, a ninth resistor, a tenth resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a second diode, a third diode and a power chip;

[0010] One end of the eighth resistor, one end of the ninth resistor, the positive electrode of the fourth capacitor and the third pin of the power chip are connected to the second pin of the power chip, and the other end of the eighth resistor is connected to the positive electrode of the second diode; the other end of the ninth resistor is connected to the negative electrode of the second diode; the first pin of the power chip and the negative electrode of the fourth capacitor are grounded; the sixth pin of the power chip and the positive electrode of the sixth capacitor are connected to one end of the tenth resistor; the other end of the tenth resistor is connected to the positive electrode of the third diode; the eighth pin of the power chip is connected to the positive electrode of the fifth capacitor; the seventh pin of the power chip, the negative electrode of the sixth capacitor and the negative electrode of the fifth capacitor are all grounded; the negative electrode of the third diode is connected to the star sealing module as a connection end; the positive electrode of the second diode is connected to the optocoupler driving module as a connection end; the second pin of the power chip is connected to the power supply.

[0011] Furthermore, in the embodiment of the present application, the output voltage of the power chip is 24V and the input voltage is 12V.

[0012] Furthermore, in the embodiment of the present application, the fourth capacitor, the fifth capacitor and the sixth capacitor are all electrolytic capacitors; the withstand voltage of the fourth capacitor is greater than or equal to 12V, and the withstand voltage of the fifth capacitor and the withstand voltage of the sixth capacitor are both greater than or equal to 24V.

[0013] Further, in the embodiment of the present application, the optical coupler driving module includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, a third capacitor, a first transistor, a second transistor, a first diode, an optical coupler and a main control board;

[0014] The positive electrode of the first diode is connected to the signal output end of the main control board, and the negative electrode of the first diode is connected to one end of the first resistor; the other end of the first resistor, one end of the second resistor and one end of the first capacitor are connected to the base of the first transistor; one end of the third resistor and one end of the fourth resistor are connected to the collector of the first transistor; the other end of the fourth resistor and one end of the second capacitor are connected to the base of the second transistor; the other end of the third resistor and one end of the fifth resistor are connected to the power output end of the main control board; the other end of the fifth resistor and one end of the sixth resistor are connected to the first pin of the optical coupler; the other end of the sixth resistor and the second pin of the optical coupler are connected to the collector of the second transistor; the fourth pin of the optical coupler is connected to one end of the seventh resistor, and the other end of the seventh resistor is connected to one end of the third capacitor;

[0015] The other end of the second resistor, the other end of the first capacitor, the other end of the second capacitor, the other end of the third capacitor, the emitter of the first transistor, the emitter of the second transistor and the third pin of the optocoupler are all grounded.

[0016] Furthermore, in the embodiment of the present application, the output voltage of the power output terminal of the main control board is 5V.

[0017] Furthermore, in the embodiment of the present application, the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor and the sixth transistor are all insulated gate bipolar transistors.

[0018] On the other hand, an embodiment of the present application further provides an elevator star sealing system, comprising an electronic star sealing circuit as described in any of the above items.

[0019] On the other hand, an embodiment of the present application further provides an elevator, comprising the elevator star sealing system as described above.

[0020] The advantages and benefits of the present application will be partially given in the following description, and partially become apparent from the following description, or be understood through the practice of the present application:

[0021] The present application can be realized by controlling the transistor when the elevator needs to close the star. The transistor not only has a fast response speed but also has a simple structure and a small size, which can effectively reduce the closing star response time and the space required for the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of an electronic star sealing circuit in a specific embodiment of the utility model;

[0023] Figure 2This is a circuit diagram of an electronic star sealing circuit in a specific embodiment of the utility model;

[0024] Figure 3 The figure is a circuit diagram of an electronic star sealing circuit in another specific embodiment of the utility model. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings to illustrate the principles and processes of the electronic star-sealing circuit, system and elevator in the embodiments of the present invention.

[0026] Reference Figure 1 The electronic star-sealing circuit of the present application can include an optocoupler driving module 1, a voltage conversion module 2 and a star-sealing module 3. The optocoupler driving module and the star-sealing module can be connected to the voltage conversion module; the star-sealing module is used to connect a three-phase motor.

[0027] Among them, the star-sealing module may include a first transistor U1, a second transistor V1, a third transistor W1, a fourth transistor U2, a fifth transistor V2 and a sixth transistor W2; the collector of the first transistor U1, the collector of the second transistor V1 and the collector of the third transistor W1 may be connected to the positive electrode of the DC bus; the emitter of the first transistor U1 and the collector of the fourth transistor U2 may be connected to the first input end of the three-phase motor; the emitter of the second transistor V1 and the collector of the fifth transistor V2 may be connected to the second input end of the three-phase motor; the emitter of the third transistor W1 and the collector of the sixth transistor W2 may be connected to the third input end of the three-phase motor; the gate of the fourth transistor U2, the gate of the fifth transistor V2 and the gate of the sixth transistor W2 may be connected to the voltage conversion module; the emitter of the fourth transistor U2, the emitter of the fifth transistor V2 and the emitter of the sixth transistor W2 may be connected to the negative electrode of the DC bus; the emitter of the fourth transistor U2, the emitter of the fifth transistor V2 and the emitter of the sixth transistor W2 are all grounded. The gate of the first transistor U1 , the gate of the second transistor V1 , and the gate of the third transistor W1 are suspended.

[0028] Further, refer to Figure 1 In some embodiments of the present application, the electronic star-sealing circuit may further include a release power supply; the release power supply may provide power for the optocoupler drive module and the voltage conversion module.

[0029] Further, refer to Figure 2 In some embodiments of the present application, the voltage conversion module may include an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a second diode D2, a third diode D3 and a power chip U2.

[0030] One end of the eighth resistor R8, one end of the ninth resistor R9, the positive electrode of the fourth capacitor C4 and the third pin of the power chip U2 can be connected to the second pin of the power chip U2, and the other end of the eighth resistor R8 can be connected to the positive electrode of the second diode D2; the other end of the ninth resistor R9 can be connected to the negative electrode of the second diode D2; the first pin of the power chip U2 and the negative electrode of the fourth capacitor are grounded; the sixth pin of the power chip U2 and the positive electrode of the sixth capacitor C6 can be connected to one end of the tenth resistor R10; the other end of the tenth resistor R10 can be connected to the positive electrode of the third diode D3; the eighth pin of the power chip U2 can be connected to the positive electrode of the fifth capacitor C5; the seventh pin of the power chip U2, the negative electrode of the sixth capacitor C6 and the negative electrode of the fifth capacitor C5 are all grounded; the negative electrode of the third diode D3 can be connected to the star sealing module as a connection end; the positive electrode of the second diode D2 can be connected to the optocoupler drive module as a connection end; the second pin of the power chip U2 can be connected to the power supply.

[0031] Further, refer to Figure 2 In some embodiments of the present application, the output voltage of the power chip U2 is 24V and the input voltage is 12V.

[0032] Furthermore, in some embodiments of the present application, the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 are all electrolytic capacitors; the withstand voltage of the fourth capacitor C4 is greater than or equal to 12V, and the withstand voltage of the fifth capacitor C5 and the withstand voltage of the sixth capacitor C6 are both greater than or equal to 24V.

[0033] Furthermore, in some embodiments of the present application, the optocoupler driving module may include a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first transistor Q1, a second transistor Q2, a first diode D1, an optocoupler U1 and a main control board. It can be understood that the main control board can be a control circuit composed of an MCU and peripheral circuits, or it can be a control circuit composed of other control chips.

[0034] The positive electrode of the first diode D1 can be connected to the signal output end of the main control board, and the negative electrode of the first diode D1 can be connected to one end of the first resistor R1; the other end of the first resistor R1, one end of the second resistor R2 and one end of the first capacitor C1 can be connected to the base of the first transistor Q1; one end of the third resistor R3 and one end of the fourth resistor R4 can be connected to the collector of the first transistor Q1; the other end of the fourth resistor R4 and one end of the second capacitor C2 can be connected to the base of the second transistor Q2; the other end of the third resistor R3 and one end of the fifth resistor R5 can be connected to the power output end of the main control board; the other end of the fifth resistor R5 and one end of the sixth resistor R6 can be connected to the first pin of the optical coupler U1; the other end of the sixth resistor R6 and the second pin of the optical coupler U1 can be connected to the collector of the second transistor Q2; the fourth pin of the optical coupler U1 can be connected to one end of the seventh resistor R7, and the other end of the seventh resistor R7 can be connected to one end of the third capacitor C3.

[0035] The other end of the second resistor R2, the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third capacitor C3, the emitter of the first transistor Q1, the emitter of the second transistor Q2 and the third pin of the optocoupler U1 are all grounded.

[0036] Furthermore, in some embodiments of the present application, the output voltage of the power output terminal of the main control board is 5V.

[0037] Furthermore, in some embodiments of the present application, the first transistor U1 , the second transistor V1 , the third transistor W1 , the fourth transistor U2 , the fifth transistor V2 , and the sixth transistor W2 are all insulated gate bipolar transistors.

[0038] The specific principles of this application are described below with reference to the accompanying drawings:

[0039] The circuit of this embodiment can be specifically referred to Figure 3 .like Figure 3 As shown, the circuit of this embodiment may include an optical coupling driving module 101 , a voltage conversion module 102 , a star-sealing module 103 , a brake release power supply 104 and a motor 105 .

[0040] The optocoupler drive module 101 is mainly composed of an optocoupler U1, a DC / DC power chip U2 and two transistors Q1 and Q2. Its control signal is the FX signal sent by the main control board. The star-sealing module 103 is also a frequency converter inverter bridge, which can be composed of three groups of bridge arms. VDC+ and VDC- are DC bus 540V inputs. The frequency converter inverter bridge can be connected to the motor 105.

[0041] In the voltage conversion module 102, the 3rd pin of the optocoupler U1 can be connected to the 1st pin GND of the DC / DC power chip U2; the 4th pin of the optocoupler U1 can be connected to the 3rd pin Ctrl of the DC / DC power chip U2; the brake release power supply 104 can be connected to the 2nd pin Vin of the DC / DC power chip U2 of the voltage conversion module 102, and supply 12V to the DC / DC power chip U2 when there is no mains power; and the DC / DC power chip U2 of the voltage conversion module 102 acts in the voltage conversion module 102 to boost the input 12V, and the 6th pin VO+ and the 7th pin VO- of the power chip U2 output 24V to provide driving power for the insulated gate bipolar transistors (IGBT) U2, V2, and W2 of the three-phase inverter bridge UVW of the frequency converter. The brake release power supply 104 is the emergency rescue power supply in the elevator control cabinet. In the absence of mains power, in addition to supplying 12V to the DC / DC power chip U2, it also supplies power to the main control board 102. Under the joint action of the optical coupler drive module 101, the main control board 102, the voltage conversion module 103, the star-sealing module 103, and the brake release power supply 104, the motor (5) can be turned on simultaneously through the UVW three-phase lower tubes U2, V2, and W2 to achieve the effect of three-phase short-circuiting, thereby generating a braking torque to limit the falling speed of the car.

[0042] In summary, the present application can realize electronic star sealing in the absence of mains power without star sealing contactors and main contactors, which not only saves hardware costs, but also simplifies the wiring work to a certain extent, reduces the risk of danger caused by wiring errors, and compared with the method of using star sealing contactors and main contactors to realize the star sealing function, the circuit of the present application uses electronic star sealing to shorten the response time of the star sealing, and can more effectively protect the lives of passengers.

[0043] This embodiment also provides an electronic star sealing system, which may include at least one electronic star sealing circuit.

[0044] It should be noted that the contents of the above-mentioned electronic star sealing circuit embodiments are all applicable to the present electronic star sealing system embodiments, the functions specifically implemented by the present electronic star sealing system embodiments are the same as those of the above-mentioned electronic star sealing circuit embodiments, and the beneficial effects achieved are also the same as those achieved by the above-mentioned electronic star sealing circuit embodiments.

[0045] In addition, an elevator is provided in an embodiment of the present application, which may include one or more electronic star sealing systems described in any of the above embodiments.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "switch" should be understood in a broad sense, for example, it can be a transformation or a conversion; for ordinary technicians in this field, the specific meaning of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of this specification, the description of the reference term means that the specific structure or feature described in conjunction with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0049] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the described embodiments. Technical personnel familiar with the field may make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. An electronic star sealing circuit, characterized in that: include: An optocoupler drive module, a voltage conversion module and a star-sealing module; the optocoupler drive module and the star-sealing module are connected to the voltage conversion module; the star-sealing module is used to connect a three-phase motor; Wherein, the star-sealing module includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor and a sixth transistor; the collector of the first transistor, the collector of the second transistor and the collector of the third transistor are connected to the positive electrode of the DC bus; the emitter of the first transistor and the collector of the fourth transistor are connected to the first input end of the three-phase motor; the emitter of the second transistor and the collector of the fifth transistor are connected to the second input end of the three-phase motor; the emitter of the third transistor and the collector of the sixth transistor are connected to the third input end of the three-phase motor; the gate of the fourth transistor, the gate of the fifth transistor and the gate of the sixth transistor are connected to the voltage conversion module; the emitter of the fourth transistor, the emitter of the fifth transistor and the emitter of the sixth transistor are connected to the negative electrode of the DC bus; the emitter of the fourth transistor, the emitter of the fifth transistor and the emitter of the sixth transistor are all grounded.

2. The electronic star sealing circuit according to claim 1, characterized in that: The circuit also includes a release power supply; the release power supply is used to provide power for the optical coupling drive module and the voltage conversion module.

3. The electronic star sealing circuit according to claim 1, characterized in that: The voltage conversion module includes: an eighth resistor, a ninth resistor, a tenth resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a second diode, a third diode and a power chip; One end of the eighth resistor, one end of the ninth resistor, the positive electrode of the fourth capacitor and the third pin of the power chip are connected to the second pin of the power chip, and the other end of the eighth resistor is connected to the positive electrode of the second diode; the other end of the ninth resistor is connected to the negative electrode of the second diode; the first pin of the power chip and the negative electrode of the fourth capacitor are grounded; the sixth pin of the power chip and the positive electrode of the sixth capacitor are connected to one end of the tenth resistor; the other end of the tenth resistor is connected to the positive electrode of the third diode; the eighth pin of the power chip is connected to the positive electrode of the fifth capacitor; the seventh pin of the power chip, the negative electrode of the sixth capacitor and the negative electrode of the fifth capacitor are all grounded; the negative electrode of the third diode is connected to the star sealing module as a connection end; the positive electrode of the second diode is connected to the optocoupler driving module as a connection end; the second pin of the power chip is connected to the power supply.

4. The electronic star sealing circuit according to claim 3, characterized in that: The output voltage of the power chip is 24V and the input voltage is 12V.

5. The electronic star sealing circuit according to claim 3, characterized in that: The fourth capacitor, the fifth capacitor and the sixth capacitor are all electrolytic capacitors; the withstand voltage of the fourth capacitor is greater than or equal to 12V, and the withstand voltage of the fifth capacitor and the withstand voltage of the sixth capacitor are both greater than or equal to 24V.

6. The electronic star sealing circuit according to claim 1, characterized in that: The optical coupler driving module includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, a third capacitor, a first transistor, a second transistor, a first diode, an optical coupler and a main control board; The positive electrode of the first diode is connected to the signal output end of the main control board, and the negative electrode of the first diode is connected to one end of the first resistor; the other end of the first resistor, one end of the second resistor and one end of the first capacitor are connected to the base of the first transistor; one end of the third resistor and one end of the fourth resistor are connected to the collector of the first transistor; the other end of the fourth resistor and one end of the second capacitor are connected to the base of the second transistor; the other end of the third resistor and one end of the fifth resistor are connected to the power output end of the main control board; the other end of the fifth resistor and one end of the sixth resistor are connected to the first pin of the optical coupler; the other end of the sixth resistor and the second pin of the optical coupler are connected to the collector of the second transistor; the fourth pin of the optical coupler is connected to one end of the seventh resistor, and the other end of the seventh resistor is connected to one end of the third capacitor; The other end of the second resistor, the other end of the first capacitor, the other end of the second capacitor, the other end of the third capacitor, the emitter of the first transistor, the emitter of the second transistor and the third pin of the optocoupler are all grounded.

7. The electronic star sealing circuit according to claim 6, characterized in that: The output voltage of the power output terminal of the main control board is 5V.

8. The electronic star sealing circuit according to claim 1, characterized in that: The first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor and the sixth transistor are all insulated gate bipolar transistors.

9. An electronic satellite sealing system, characterized in that: It comprises the electronic star sealing circuit as described in any one of claims 1 to 8.

10. An elevator, characterized in that: It comprises the electronic star sealing system as claimed in claim 9.

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