CN111453563B - Elevator control device - Google Patents
Elevator control device Download PDFInfo
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- CN111453563B CN111453563B CN201910052257.4A CN201910052257A CN111453563B CN 111453563 B CN111453563 B CN 111453563B CN 201910052257 A CN201910052257 A CN 201910052257A CN 111453563 B CN111453563 B CN 111453563B
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- super capacitor
- direct current
- contactor
- elevator
- circuit breaker
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/02—Control systems without regulation, i.e. without retroactive action
- B66B1/06—Control systems without regulation, i.e. without retroactive action electric
- B66B1/14—Control systems without regulation, i.e. without retroactive action electric with devices, e.g. push-buttons, for indirect control of movements
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Abstract
The invention discloses an elevator control device, which comprises a super capacitor, a super capacitor circuit breaker, a super capacitor contactor and a bidirectional direct current converter, wherein the super capacitor circuit breaker is connected with the super capacitor contactor; the super capacitor contactor is an alternating current contactor; one end of the super capacitor circuit breaker is connected with the super capacitor, and the other end of the super capacitor circuit breaker is connected in series to a direct current bus of the elevator main loop through the super capacitor contactor and the bidirectional direct current converter; when the elevator is normally started, the super capacitor contactor is controlled to be closed, and then a power semiconductor device in the bidirectional direct current converter is driven to work; when the elevator is normally stopped, the power semiconductor device in the bidirectional direct current converter is controlled to be turned off, and then the super capacitor contactor is controlled to be turned off; when a power semiconductor device of the bidirectional direct current converter has a turn-off fault, the super capacitor circuit breaker is controlled to be turned off firstly, and the super capacitor contactor is turned off after time delay. The elevator control device can meet the requirements of GB 7588-2003 Elevator manufacturing and safety regulations, and has long-term reliable operation capability and low cost.
Description
Technical Field
The invention relates to an elevator technology, in particular to an elevator control device.
Background
Super capacitor, also known as electrochemical capacitor, double layer capacitor, gold capacitor, farad capacitor, is an electrochemical element developed from the seventh and eighty years of the past century that stores energy through polarized electrolyte. It is different from traditional chemical power source, and is a power source with special performance between traditional capacitor and battery, and mainly depends on electric double layer and redox capacitance to store electric energy. But no chemical reaction occurs in the process of energy storage, and the energy storage process is reversible, and the super capacitor can be repeatedly charged and discharged for tens of thousands of times.
The super capacitor is used for storing and using the feedback electric energy of the elevator during regenerative operation, and is one of important ways for reducing the energy consumption of the elevator. Since supercapacitors are dc energy storage devices, they are connected to the dc bus of an elevator via a bidirectional dc converter in the prior art. The DC converter has the biggest characteristic that the bidirectional flow of power at two ends can be realized, namely, the elevator transfers the regenerative electric energy on a DC bus to the super capacitor when in regenerative (power generation) operation; when the elevator runs electrically, the electric energy on the super capacitor is transferred to the direct current bus. That is to say, under the condition that the electric energy of the super capacitor is sufficient, the elevator can be driven to run only by the power supply of the super capacitor.
Then, according to the requirements of section 12.7.3 of the precedent mandatory standard GB 7588 and 2003 "elevator manufacturing and safety codes", static element power supply and control for alternating current or direct current motors, one of the following methods should be used:
(a) two separate contactors are used to break the motor current.
When the elevator stops, if the main contact of one of the contactors is not opened, the car must be prevented from moving again at the latest when the direction of movement is changed next time
(b) A system comprising the following elements:
(1) a contactor for cutting off the current of each phase (pole). The contactor coil should be released at least before each change of direction of movement. If the contactor is not released, the elevator should be prevented from re-operating;
(2) control means for blocking the flow of current in the static element;
(3) a monitoring device for checking the current flow of an elevator at each stop. During normal parking, if the static element fails to effectively block the flow of current, the monitoring device should release the contactor and should prevent the elevator from re-operating.
The (ac) main contactor of the elevator is arranged on the input side of the three-phase ac power supply and can only interrupt the current flowing from the external network to the motor. After the configuration of the supercapacitor, at least one contactor should also be provided on the supply circuit of the supercapacitor in order to ensure that the standard requirements are met. According to the conventional design, a direct current contactor is required to be selected. However, the dc contactors currently on the market for meeting the required power level generally have the problems of large volume (occupying a large amount of equipment space), high price (generally being dozens of times of the ac contactors with the same current level), and large vibration and noise during the switching action (requiring additional vibration reduction and silencing mechanisms). This makes the super capacitor power supply device, besides being very heavy, the high cost (selling price) can completely wipe off the economic benefit brought by its energy saving, so that its acceptance in the market is very low.
Disclosure of Invention
The invention aims to provide an elevator control device which can meet the requirements of GB 7588 plus 2003 elevator manufacturing and safety regulations and has long-term reliable operation capability and low cost.
In order to solve the technical problem, the elevator control device provided by the invention comprises a super capacitor 300, a super capacitor circuit breaker 301, a super capacitor contactor 302 and a bidirectional direct current converter 303;
the super capacitor contactor 302 is an alternating current contactor;
one end of the super capacitor circuit breaker 301 is connected with the super capacitor 300, and the other end of the super capacitor circuit breaker is connected in series to a direct current bus of an elevator main loop through a super capacitor contactor 302 and a bidirectional direct current converter 303;
when the elevator is normally started, the super capacitor contactor 302 is controlled to be closed, and then the power semiconductor device 303.1 in the bidirectional direct current converter 303 is driven to work;
when the elevator is normally stopped, the power semiconductor device 303.1 in the bidirectional direct current converter 303 is controlled to be turned off, and then the super capacitor contactor 302 is controlled to be turned off;
when a power semiconductor device 303.1 of the bidirectional direct current converter 303 has a turn-off fault, the super capacitor circuit breaker 301 is controlled to be turned off firstly, and the super capacitor contactor 302 is turned off after time delay.
Preferably, one end of the super capacitor contactor 302 is connected to the super capacitor circuit breaker 301, and the other end is connected to the low voltage end of the bidirectional dc converter 303.
Preferably, one end of the super capacitor contactor 302 is connected to the high voltage end of the bidirectional dc converter 303, and the other end is connected to the dc bus of the elevator main loop.
Preferably, the elevator control apparatus further includes a monitoring apparatus 200;
the monitoring device 200 is communicated with an elevator main controller, and is used for controlling the on-off of the super capacitor contactor 302 and controlling the on-off of a power semiconductor device 303.1 in a bidirectional direct current converter 303;
after receiving a normal elevator starting signal, the monitoring device 200 firstly controls the super capacitor contactor 302 to be closed, and then starts to send a working driving signal to drive the power semiconductor device 303.1 in the bidirectional direct current converter 303 to work; when the normal shutdown signal of the elevator is received, a shutdown control signal is sent to control the power semiconductor device 303.1 in the bidirectional direct current converter 303 to be shut down, and then the super capacitor contactor 302 is controlled to be disconnected.
Preferably, the monitoring device 200 is further configured to control on/off of the super capacitor circuit breaker 301;
after the monitoring device 200 sends a shutdown control signal to control the power semiconductor device 303.1 in the bidirectional dc converter 303 to be shut down, if it is still detected that a current flows through the power semiconductor device 303.1, the monitoring device immediately controls the super capacitor circuit breaker 301 to be disconnected, and after a delay, the super capacitor contactor 302 is disconnected.
Preferably, a shunt release 301.1 is additionally arranged in the super capacitor circuit breaker 301;
the monitoring device 200 controls the shunt release 301.1 to act so as to automatically trip and disconnect the super capacitor circuit breaker 301.
Preferably, the control coil 302.1 of the super capacitor contactor 302 and the auxiliary contact 301.3 of the super capacitor circuit breaker 301 are connected in series in the control loop of the super capacitor contactor 302 of the monitoring device 200;
when the monitoring device 200 controls the shunt release 301.1 to act to automatically trip and open the super capacitor circuit breaker 301, the auxiliary contact 301.3 of the super capacitor circuit breaker 301 is also opened synchronously.
Preferably, a remote operation accessory 301.2 is additionally arranged in the super capacitor circuit breaker 301;
the remotely operated accessory 301.2 is controlled by the monitoring device 200;
the remote operation accessory 301.2 controls the super capacitor circuit breaker 301 to open and close according to the remote control signal sent by the monitoring device 200.
Preferably, the elevator main circuit includes a rectifier 103, an inverter 106 and a traction motor 107;
the rectifier 103 rectifies the three-phase alternating current power supply 100 and outputs direct current to a direct current bus of an elevator main loop;
the inverter 106 inverts the dc power of the dc bus into ac power and outputs the ac power to the hoisting motor 107.
Preferably, the elevator main loop further comprises a main circuit breaker 101, a main contactor 102, a main capacitor 104;
the rectifier 103 is connected with a three-phase alternating current power supply 100 through a main breaker 101 and a main contactor 102;
the main capacitor 104 is connected between the two dc busbars.
Preferably, the elevator main circuit further comprises a discharge circuit 105;
the discharge circuit 105 includes a discharge resistor and a discharge switch;
the discharge resistor and the discharge switch are connected in series between the two direct current buses.
Preferably, the bidirectional dc converter 303 includes two IGBTs 303.1, two diodes 303.3, and a dc reactor 303.2;
the gate electrodes of the two IGBTs 303.1 are respectively connected with the monitoring device 200;
wherein the collector of the first IGBT303.1 is connected to the emitter of the second IGBT303.1 as a first node;
the emitter of the first IGBT303.1 and the collector of the second IGBT303.1 are used as two high-voltage terminals of the bidirectional dc converter 303;
two diodes 303.3 are connected in series between two high-voltage ends of the bidirectional dc converter 303, and a connection point of the two diodes 303.3 serves as a low-voltage end of the bidirectional dc converter 303;
the dc reactor 303.2 is connected between the junction of the diode 303.3 and the first node. .
When the elevator is normally started, before a power semiconductor device (static element) 303.1 in a bidirectional direct current converter 303 is conducted, a whole super capacitor power supply loop is disconnected, and no current flows before and after a contact of a super capacitor contactor 302 is closed; when the elevator is normally stopped, after a power semiconductor device (static element) 303.1 in a bidirectional direct-current converter 303 is cut off, the whole super capacitor power supply loop is disconnected, and no current flows before and after the contact of a super capacitor contactor 302 is disconnected; when the power semiconductor device (static element) 303.1 of the bidirectional direct current converter 303 has a turn-off fault, the super capacitor circuit breaker 301 firstly cuts off the whole super capacitor power supply loop, and no current flows before and after the contact of the super capacitor contactor 302 is cut off. In the elevator control apparatus according to the first embodiment, an ac contactor of the same current standard is used in the super capacitor power supply circuit instead of the dc contactor as the super capacitor contactor 302, and after the ac contactor is used, the power semiconductor device (static element) 303.1 in the bidirectional dc converter 303 functions to block the flow of the dc current during its normal operation, and the ac contactor is opened only after the power semiconductor device (static element) 303.1 in the bidirectional dc converter 303 stops the current, so that the super capacitor contactor 302 is only of the ac type, but does not directly break the dc current and cause an arc to burn out the contact. Similarly, the ac contactor is closed before the power semiconductor device (static element) 303.1 in the bi-directional dc converter 303 conducts current, and there is no inrush current when its contacts are closed. The elevator control device has the advantages that the alternating current contactor and the power semiconductor device (static element) 303.1 in the bidirectional direct current converter 303 stagger in time sequence, so that the requirement of 12.7.3 (b) (1) point of GB 7588 plus 2003 elevator manufacturing and safety standard can be met, the alternating current contactor can be normally used for a long time without being damaged, the elevator control device has the capability of long-term reliable operation, the cost of the device is greatly reduced, and the competitive advantage of the product is highlighted.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a circuit diagram of an embodiment of an elevator control apparatus according to the present invention;
fig. 2 is a circuit diagram of another embodiment of the elevator control apparatus of the present invention;
fig. 3 is a schematic operation timing diagram of an embodiment of the elevator control apparatus of the present invention;
fig. 4 is a schematic diagram of the control coil of the super capacitor contactor and the auxiliary contact of the super capacitor circuit breaker in series in the super capacitor contactor control loop of the monitoring device according to the embodiment of the elevator control device.
Description of the reference numerals
100 three-phase AC power supply; 101 a main circuit breaker; 102 a main contactor; 103 a rectifier; 104 a main capacitor; 105 a discharge loop; 106 an inverter; 107 traction motors; 200 a monitoring device; 300 a super capacitor; 301 a super capacitor circuit breaker; 301.1 shunt release; 301.2 remote operation accessory; 301.3 auxiliary contacts of the super capacitor circuit breaker; 302 a supercapacitor contactor; 302.1 super capacitor contactor control coil; 303 a bidirectional dc converter; 303.1 power semiconductor devices; 303.2 direct current reactors; 303.3 diode.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1 and 2, the elevator control device includes a super capacitor 300, a super capacitor breaker 301, a super capacitor contactor 302, and a bidirectional dc converter 303;
the super capacitor contactor 302 is an alternating current contactor;
one end of the super capacitor circuit breaker 301 is connected with the super capacitor 300, and the other end of the super capacitor circuit breaker is connected in series to a direct current bus of an elevator main loop through a super capacitor contactor 302 and a bidirectional direct current converter 303;
as shown in fig. 3, when the elevator is normally started, the super capacitor contactor 302 is controlled to be closed, and then a power semiconductor device (static component) 303.1 in the bidirectional dc converter 303 is driven to operate through PWM (pulse width modulation), wherein a shaded part in fig. 3 indicates that the power semiconductor device is in a high-frequency on-off operating state;
when the elevator is normally stopped, the power semiconductor device (static element) 303.1 in the bidirectional direct current converter 303 is controlled to be turned off, and then the super capacitor contactor 302 is controlled to be turned off;
when a power semiconductor device (static element) 303.1 of the bidirectional direct current converter 303 has a turn-off fault, the super capacitor circuit breaker 301 is controlled to be turned off firstly, and the super capacitor contactor 302 is turned off after time delay.
The power semiconductor device is also called a power electronic device, and is a semiconductor device which performs power processing and has the capability of processing high voltage and large current, the voltage processing range is from tens of volts to thousands of volts, and the current capability can reach thousands of amperes at most. Typical power handling includes frequency conversion, voltage conversion, current conversion, power management, and the like. Power semiconductor devices are used in most cases as switches (switches) for controlling the passage and interruption of current. Power semiconductor devices include high power diodes, thyristors, power BJTs (i.e., power bipolar transistors), power MOSFETs (e.g., VDMOS, LDMOS, and IGBTs). VDMOS (vertical double-diffusion MOSFET) is a vertical device, and is mostly used for discrete devices; the LDMOS (Lateral double-diffusion MOSFET) is a transverse device, three electrodes of the LDMOS are all arranged on the surface of a silicon wafer, the LDMOS is easy to integrate and is mainly used in the field of power integrated circuits; the IGBT (Insulated Gate Bipolar Transistor) can be regarded as a new hybrid device of a power MOS and a power BJT.
In the elevator control device according to the first embodiment, when the elevator is normally started, before the power semiconductor device (static element) 303.1 in the bidirectional dc converter 303 is turned on, the entire super capacitor power supply loop is disconnected, and no current flows before and after the contact of the super capacitor contactor 302 is closed; when the elevator is normally shut down, after a power semiconductor device (static element) 303.1 in the bidirectional direct current converter 303 is cut off, the whole super capacitor power supply loop is disconnected, and no current flows before and after the contact of the super capacitor contactor 302 is disconnected; when the power semiconductor device (static element) 303.1 of the bidirectional dc converter 303 has an off-state fault, the supercapacitor circuit breaker 301 opens the entire supercapacitor power supply circuit in advance, and no current flows before and after the contact of the supercapacitor contactor 302 is opened. In the elevator control apparatus according to the first embodiment, an ac contactor of the same current standard is used in the super capacitor power supply circuit instead of the dc contactor as the super capacitor contactor 302, and after the ac contactor is used, the power semiconductor device (static element) 303.1 in the bidirectional dc converter 303 functions to block the flow of the dc current during its normal operation, and the ac contactor is opened only after the power semiconductor device (static element) 303.1 in the bidirectional dc converter 303 stops the current, so that the super capacitor contactor 302 is only of the ac type, but does not directly break the dc current and cause an arc to burn out the contact. Similarly, the ac contactor is closed before the power semiconductor device (static element) 303.1 in the bi-directional dc converter 303 conducts current, and there is no inrush current when its contacts are closed. In the elevator control device according to the first embodiment, the alternating current contactor and the power semiconductor device (static component) 303.1 in the bidirectional direct current converter 303 perform staggered actions in time sequence, so that the requirement of section (b) (1) in article 12.7.3 of GB 7588 plus 2003 elevator manufacturing and safety standard can be met, the alternating current contactor can be normally used for a long time without being damaged, the elevator control device has the capability of long-term reliable operation, the cost of the device is greatly reduced, and the competitive advantage of the product is highlighted.
Example two
According to the elevator control device of the first embodiment, one end of the super capacitor contactor 302 is connected with the super capacitor circuit breaker 301, and the other end is connected with the low-voltage end of the bidirectional direct current converter 303, as shown in fig. 1.
EXAMPLE III
According to the elevator control device in the first embodiment, one end of the super capacitor contactor 302 is connected with the high-voltage end of the bidirectional direct current converter 303, and the other end is connected with the direct current bus of the elevator main loop, as shown in fig. 2.
In the elevator control device in the third embodiment, the position of the super capacitor contactor 302 is shifted from the front side of the super capacitor 300 (i.e. the low-voltage side of the bidirectional dc converter 303) to the connection loop with the elevator main loop dc bus (i.e. the high-voltage side of the bidirectional dc converter 303), so that the current of the high-voltage side is much smaller than that of the low-voltage side (about 1/10) under the same power, and the (rated current) specification selected by the super capacitor contactor 302 can be further reduced, thereby reducing the occupied space and the use cost.
Example four
According to the first embodiment, as shown in fig. 1 and 2, the elevator control device further includes a monitoring device 200;
the monitoring device 200 is communicated with an elevator main controller, and is used for controlling the on-off of the super capacitor contactor 302 and controlling the on-off of a power semiconductor device (static element) 303.1 in the bidirectional direct current converter 303;
after receiving a normal elevator starting signal, the monitoring device 200 firstly controls the super capacitor contactor 302 to be closed, and then starts to send a working driving signal to drive a power semiconductor device (static element) 303.1 in the bidirectional direct current converter 303 to work; when the normal shutdown signal of the elevator is received, a shutdown control signal is sent to control a power semiconductor device (static element) 303.1 in the bidirectional direct current converter 303 to be shut down, and then the super capacitor contactor 302 is controlled to be disconnected.
The monitoring device 200 is associated with or part of an elevator control system.
EXAMPLE five
Based on the elevator control device in the fourth embodiment, the monitoring device 200 is further configured to control the on/off of the super capacitor circuit breaker 301;
after the monitoring device 200 sends a shutdown control signal to control the power semiconductor device 303.1 in the bidirectional dc converter 303 to be shut down, if it is still detected that a current flows through the power semiconductor device 303.1, the monitoring device immediately controls the super capacitor circuit breaker 301 to be disconnected, and after a delay, the super capacitor contactor 302 is disconnected.
EXAMPLE six
Based on the elevator control device of the fifth embodiment, as shown in fig. 1, a shunt release 301.1 is additionally installed in the super capacitor circuit breaker 301;
the monitoring device 200 controls the shunt release 301.1 to act so as to automatically trip and disconnect the super capacitor circuit breaker 301.
The shunt release is an accessory for remotely controlling the opening brake. When the power supply voltage is equal to any voltage between 70% and 110% of the rated control power supply voltage, the circuit breaker can be reliably disconnected. The shunt release is a short-time working system, the energizing time of the coil generally cannot exceed 1S, otherwise the coil can be blown. The plastic shell circuit breaker is characterized in that a microswitch is connected in series with the shunt release for preventing the coil from being burnt, when the shunt release is attracted by the armature, the microswitch is switched from a closed state to an open state, and even if a button is manually pressed due to the fact that a control circuit of a power supply of the shunt release is cut off, the shunt coil is not electrified any more all the time, and the coil burning loss is avoided. When the breaker is buckled and closed again, the micro switch returns to the closed position again.
In the elevator control apparatus according to the sixth embodiment, the shunt release 301.1 is additionally installed in the super capacitor circuit breaker 301 of the super capacitor power supply circuit, and when the power semiconductor device (static component) 303.1 of the bidirectional dc converter 303 fails (cannot cut off current), according to the requirement of section (3) in section 12.7.3 (b) of GB 7588 and 2003 "elevator manufacturing and safety standard", the monitoring apparatus 200 first controls the shunt release 301.1 to operate, cuts off a large current of a rated load using the super capacitor circuit breaker 301, and then controls the super capacitor contactor 302 to open, and in the case of meeting the above standard, the super capacitor contactor 302 of the ac type is not damaged.
EXAMPLE seven
Based on the elevator control device of the sixth embodiment, the control coil 302.1 of the super capacitor contactor 302 and the auxiliary contact 301.3 of the super capacitor circuit breaker 301 are connected in series in the control loop of the super capacitor contactor 302 of the monitoring device 200;
when the monitoring device 200 controls the shunt release 301.1 to act to automatically trip and open the super capacitor circuit breaker 301, the auxiliary contact 301.3 of the super capacitor circuit breaker 301 is also opened synchronously.
In the elevator control apparatus according to the seventh embodiment, even if the monitoring apparatus 200 still has a signal output for controlling the closing of the supercapacitor contactor 302, the control coil 302.1 of the supercapacitor contactor 302 is also de-energized, and the supercapacitor contactor 302 is forced to open, so that it can be ensured that the supercapacitor contactor 302 is always operated after the supercapacitor circuit breaker 301 when the power semiconductor device (static component) 303.1 of the bidirectional dc converter 303 fails (cannot cut off the current), and higher reliability is achieved.
Example eight
Based on the elevator control device of the fourth embodiment, as shown in fig. 2, a remote operation accessory 301.2 is additionally installed in the super capacitor circuit breaker 301;
the remotely operated accessory 301.2 is controlled by the monitoring device 200;
the remote operation accessory 301.2 controls the super capacitor circuit breaker 301 to open and close according to the remote control signal sent by the monitoring device 200.
According to the elevator control device in the eighth embodiment, the remote operation accessory 301.2 is additionally arranged in the super capacitor circuit breaker 301, the remote operation accessory 301.2 can not only automatically control the disconnection of the super capacitor circuit breaker 301, but also automatically control the closing of the super capacitor circuit breaker 301, after a fault is eliminated, manual intervention is not needed, the closing of the super capacitor circuit breaker 301 can be automatically controlled, the automation level of the elevator control device can be improved, and the limitation that maintenance personnel need to get on the door to manually recover after the super capacitor circuit breaker 301 is disconnected is eliminated.
Example nine
As shown in fig. 1 and 2, the elevator control apparatus according to the first embodiment includes an elevator main circuit including a rectifier 103, an inverter 106, and a hoisting motor 107;
the rectifier 103 rectifies the three-phase alternating current power supply 100 and outputs direct current to a direct current bus of an elevator main loop;
the inverter 106 inverts the dc power of the dc bus into ac power and outputs the ac power to the hoisting motor 107.
Preferably, the elevator main loop further comprises a main circuit breaker 101, a main contactor 102, a main capacitor 104;
the rectifier 103 is connected with a three-phase alternating current power supply 100 through a main breaker 101 and a main contactor 102;
the main capacitor 104 is connected between the two dc busbars.
Preferably, the elevator main circuit further comprises a discharge circuit 105;
the discharge circuit 105 includes a discharge resistor and a discharge switch;
the discharge resistor and the discharge switch are connected in series between the two direct current buses.
Example ten
Based on the elevator control device of the fourth embodiment, as shown in fig. 1 and fig. 2, the bidirectional dc converter 303 includes two IGBTs 303.1, two diodes 303.3 and one dc reactor 303.2;
the gate electrodes of the two IGBTs 303.1 are respectively connected with the monitoring device 200;
wherein the collector of the first IGBT303.1 is connected to the emitter of the second IGBT303.1 as a first node;
the emitter of the first IGBT303.1 and the collector of the second IGBT303.1 serve as two high-voltage ends of the bidirectional dc converter 303;
two diodes 303.3 are connected in series between two high-voltage ends of the bidirectional dc converter 303, and a connection point of the two diodes 303.3 serves as a low-voltage end of the bidirectional dc converter 303;
the dc reactor 303.2 is connected between the junction of the diode 303.3 and the first node.
An Insulated Gate Bipolar Transistor (IGBT) is a composite fully-controlled voltage-driven power semiconductor device consisting of a Bipolar Junction Transistor (BJT) and an insulated Gate field effect transistor (MOS), and has the advantages of high input impedance of the MOSFET and low conduction voltage drop of the GTR. The GTR saturation voltage is reduced, the current carrying density is high, but the driving current is large; the MOSFET has small driving power, high switching speed, large conduction voltage drop and small current-carrying density. The IGBT integrates the advantages of the two devices, and has small driving power and reduced saturation voltage. The method is very suitable for being applied to a converter system with the direct-current voltage of 600V or more.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. An elevator control device is characterized by comprising a super capacitor (300), a super capacitor breaker (301), a super capacitor contactor (302) and a bidirectional direct current converter (303);
the super capacitor contactor (302) is an alternating current contactor;
one end of the super capacitor circuit breaker (301) is connected with the super capacitor (300), and the other end of the super capacitor circuit breaker is connected in series to a direct current bus of an elevator main loop through a super capacitor contactor (302) and a bidirectional direct current converter (303);
when the elevator is normally started, the super capacitor contactor (302) is controlled to be closed, and then a power semiconductor device (303.1) in the bidirectional direct current converter (303) is driven to work;
when the elevator is normally stopped, the power semiconductor device (303.1) in the bidirectional direct current converter (303) is controlled to be turned off, and then the super capacitor contactor (302) is controlled to be turned off;
when a power semiconductor device (303.1) of the bidirectional direct current converter (303) has a turn-off fault, the super capacitor circuit breaker (301) is controlled to be turned off firstly, and the super capacitor contactor (302) is turned off after time delay.
2. Elevator control device according to claim 1,
one end of the super capacitor contactor (302) is connected with the super capacitor breaker (301), and the other end is connected with the low-voltage end of the bidirectional direct current converter (303).
3. Elevator control device according to claim 1,
one end of the super capacitor contactor (302) is connected with the high-voltage end of the bidirectional direct current converter (303), and the other end of the super capacitor contactor is connected with a direct current bus of the elevator main loop.
4. Elevator control device according to claim 1,
the elevator control device further comprises a monitoring device (200);
the monitoring device (200) is used for controlling the on-off of the super capacitor contactor (302) and controlling the on-off of a power semiconductor device (303.1) in the bidirectional direct current converter (303);
after receiving a normal starting signal of the elevator, the monitoring device (200) firstly controls the super capacitor contactor (302) to be closed, and then starts to send a working driving signal to drive a power semiconductor device (303.1) in the bidirectional direct current converter (303) to work; when an elevator normal shutdown signal is received, a shutdown control signal is sent to control a power semiconductor device (303.1) in the bidirectional direct current converter (303) to be shut down, and then the super capacitor contactor (302) is controlled to be disconnected.
5. Elevator control device according to claim 4,
the monitoring device (200) is also used for controlling the on-off of the super capacitor circuit breaker (301);
after the monitoring device (200) sends a turn-off control signal to control a power semiconductor device (303.1) in the bidirectional direct current converter (303) to be turned off, if the fact that current flows through the power semiconductor device (303.1) is still detected, the monitoring device immediately controls to turn off the super capacitor circuit breaker (301), and after time delay, the super capacitor contactor (302) is turned off.
6. Elevator control device according to claim 5,
a shunt release (301.1) is additionally arranged in the super capacitor circuit breaker (301);
the monitoring device (200) controls the shunt release (301.1) to act so as to automatically trip and disconnect the super capacitor circuit breaker (301).
7. Elevator control device according to claim 6,
a control coil (302.1) of the super capacitor contactor (302) and an auxiliary contact (301.3) of the super capacitor circuit breaker (301) are connected in series in a control loop of the super capacitor contactor (302) of the monitoring device (200);
when the monitoring device (200) controls the shunt release (301.1) to act to automatically trip and open the super capacitor circuit breaker (301), the auxiliary contact (301.3) of the super capacitor circuit breaker (301) is also opened synchronously.
8. Elevator control device according to claim 4,
a remote operation accessory (301.2) is additionally arranged in the super capacitor circuit breaker (301);
the remotely operated accessory (301.2) is controlled by a monitoring device (200);
the remote operation accessory (301.2) controls the super capacitor circuit breaker (301) to open and close according to a remote control signal sent by the monitoring device (200).
9. Elevator control device according to claim 1,
the elevator main loop comprises a rectifier (103), an inverter (106) and a traction motor (107);
the rectifier (103) rectifies the three-phase alternating current power supply (100) to output direct current to a direct current bus of an elevator main loop;
the inverter (106) inverts the direct current of the direct current bus into an alternating current and outputs the alternating current to the traction motor (107).
10. The elevator control apparatus according to claim 9,
the elevator main loop also comprises a main breaker (101), a main contactor (102) and a main capacitor (104);
the rectifier (103) is connected with a three-phase alternating current power supply (100) through a main breaker (101) and a main contactor (102);
the main capacitor (104) is connected between the two direct current buses.
11. Elevator control device according to claim 10,
the elevator main circuit further comprises a discharge circuit (105);
the discharge loop (105) comprises a discharge resistor and a discharge switch;
the discharge resistor and the discharge switch are connected in series between the two direct current buses.
12. Elevator control device according to claim 4,
the bidirectional direct current converter (303) comprises two IGBTs, two diodes (303.3) and a direct current reactor (303.2);
the gate electrodes of the two IGBTs are respectively connected with the monitoring device (200);
wherein the collector of the first IGBT is connected with the emitter of the second IGBT to be used as a first node;
the emitter of the first IGBT and the collector of the second IGBT are used as two high-voltage ends of the bidirectional direct-current converter (303);
the two diodes (303.3) are connected in series between two high-voltage ends of the bidirectional direct current converter (303), and the connection point of the two diodes (303.3) is used as a low-voltage end of the bidirectional direct current converter (303);
the direct current reactor (303.2) is connected between the connection point of the diode (303.3) and the first node.
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| CN201910052257.4A CN111453563B (en) | 2019-01-21 | 2019-01-21 | Elevator control device |
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| CN201910052257.4A CN111453563B (en) | 2019-01-21 | 2019-01-21 | Elevator control device |
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| CN111453563B true CN111453563B (en) | 2022-06-17 |
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