CN111547594B - Novel electric brake release system for elevator and application method thereof - Google Patents
Novel electric brake release system for elevator and application method thereof Download PDFInfo
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- CN111547594B CN111547594B CN202010376074.0A CN202010376074A CN111547594B CN 111547594 B CN111547594 B CN 111547594B CN 202010376074 A CN202010376074 A CN 202010376074A CN 111547594 B CN111547594 B CN 111547594B
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 54
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 27
- 229910052744 lithium Inorganic materials 0.000 claims description 27
- 230000000295 complement effect Effects 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/027—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
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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
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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
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
- B66B1/3423—Control system configuration, i.e. lay-out
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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
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
- B66B1/365—Means for stopping the cars, cages, or skips at predetermined levels mechanical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
- B66B3/002—Indicators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Elevator Control (AREA)
Abstract
The invention discloses a novel electric brake release system for an elevator and a use method thereof, wherein the novel electric brake release system comprises an electric brake release device, a frequency converter, a main board, an encoder and a host brake coil; the input end of the electric brake release device is connected with the mains supply, and the output end of the electric brake release device is respectively connected with the input end of the frequency converter and the main machine brake coil and respectively supplies power to the frequency converter and controls the main machine brake coil; the output end of the frequency converter is connected with the input end of the main board and supplies power to the main board; the output end of the main board is connected with the input end of the encoder and supplies power to the encoder; the output end of the encoder is connected with the main board and feeds back operation information to the main board. According to the invention, an operator can limit the speed of the elevator by manually controlling the brake release action according to the display on the main board nixie tube or the display on the handheld operator, so that the elevator is kept in a low-speed range, and the rescue safety is ensured.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to a novel electric brake release system for an elevator and a use method thereof.
Background
With the importance of people on elevator safety, the electric brake release device is widely applied to elevators; the elevator is mainly used for stopping in a non-door zone due to faults, directly supplying power to a main engine band-type brake coil through an electric brake release device, releasing a main engine band-type brake switch, so that the elevator slowly slides to the door zone, thereby opening a car door and a hall door, and releasing trapped passengers in the car. It has therefore become a conventional solution to configure an electric brake release device in order to cope with the possible non-door area trapping faults of the elevator.
However, during rescue using the electric brake release device, problems such as: during rescue, the main machine and the car are generally observed through the observation window, but in many cases, due to the influence of space positions, the main machine and the car cannot be observed well through the observation window, and at the moment, when the trapped position of the elevator is far away from the upper floor position and the lower floor position, if the elevator is kept in a car sliding state all the time, the speed of the elevator is faster and faster, and the trapped passengers are easy to panic; therefore, the above problems need to be solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel electric brake release system for an elevator and a use method thereof, and an operator can limit the speed of the elevator by manually controlling brake release action according to display on a main board nixie tube or display on a handheld operator, so that the elevator is kept in a low-speed range, and the rescue safety is ensured.
In order to solve the technical problems, the invention adopts the following technical scheme: the invention relates to a novel electric brake release system for an elevator, which has the innovation points that: the electric brake release device comprises an electric brake release device, a frequency converter, a main board, an encoder and a main machine brake coil; the input end of the electric brake release device is connected with the mains supply, and the output end of the electric brake release device is respectively connected with the input end of the frequency converter and the main machine brake coil and respectively supplies power to the frequency converter and controls the main machine brake coil; the output end of the frequency converter is connected with the input end of the main board and supplies power to the main board; the output end of the main board is connected with the input end of the encoder and supplies power to the encoder; the output end of the encoder is connected with the main board and feeds back operation information to the main board;
The electric brake release device comprises a charging transformer, a lithium battery, a square wave generating circuit, a step-up transformer and a control board; the input end of the charging transformer is electrically connected with the mains supply, and the output end of the charging transformer is electrically connected with the input end of the lithium battery and charges the lithium battery; the output end of the lithium battery is electrically connected with the input end of the control board and provides stable voltage; the output end of the control board is electrically connected with the input end of the square wave generating circuit, and the output end of the square wave generating circuit is electrically connected with the input end of the step-up transformer and outputs PWM waves; the output end of the step-up transformer is electrically connected with the input end of the frequency converter and supplies power to the frequency converter;
The control board adopts an SG3525 chip U1; the pin 15 of the SG3525 chip U1 is connected to the positive electrode of the output end of the lithium battery through a capacitor C3; pin 13 of SG3525 chip U1 is connected to the negative electrode of the output terminal of the lithium battery through relay KD; the pin 5 and the pin 7 of the SG3525 chip U1 are connected through a resistor R2, and form a discharge loop; pin 6 of SG3525 chip U1 is connected to one end of resistor R1; pin 5 of SG3525 chip U1 is connected to one end of capacitor C1; pin 8 of SG3525 chip U1 is connected to one end of capacitor C2; pin 9 of SG3525 chip U1 is connected to one end of capacitor C4; pin 1 and pin 12 of SG3525 chip U1 are grounded; pin 14 of SG3525 chip U1 is connected to one end of resistor R3; the other ends of the resistor R1, the capacitor C1 and the capacitor C2 are grounded;
The model adopted by the encoder is ERN1387.
Preferably, the square wave generating circuit comprises a MOS tube Q1, a MOS tube Q2, a capacitor C5, a resistor R6 and a resistor R7; the drain electrode D of the MOS tube Q1 is respectively connected with one end of the capacitor C5 and the terminal 6 of the step-up transformer; the other end of the capacitor C5 is connected with one end of the resistor R7; the source electrode S of the MOS tube Q2 is grounded; the drain D of the MOS transistor Q2 is connected to the other end of the resistor R7 and to the terminal 1 of the step-up transformer.
Preferably, the other ends of the pin 1 and the pin 10 of the SG3525 chip U1, and the resistor R1, the capacitor C2 and the capacitor C4 are respectively connected to the gate G of the MOS transistor Q1 through the resistor R5; the other ends of the pin 1, the pin 10, the resistor R1, the capacitor C2 and the capacitor C4 of the SG3525 chip U1 are respectively connected to the source S of the MOS tube Q1; pin 11 of SG3525 chip U1 is connected to gate G of MOS transistor Q1 through resistor R4; the other end of the resistor R3 is connected to the grid G of the MOS tube Q2; the other end of the resistor R3 is connected to the source S of the MOS transistor Q2 through a resistor R6.
Preferably, the lithium battery adopts a 12V/7AH lithium battery; the charging transformer is of the type EI-41; the step-up transformer is of the type EI30, and the terminal 7 and the terminal 10 of the step-up transformer are respectively connected with the input end of the frequency converter.
Preferably, the frequency converter is of a model of KLA100D, and is directly powered to the main board through a thin flat cable.
Preferably, the model of the main board is KLA-MCD, and the encoder is directly powered by a thin flat cable.
The invention relates to a use method of a novel electric brake release system for an elevator, which is characterized by comprising the following steps of:
(1) When commercial power exists, the relay KD is disconnected, and the AC220V commercial power charges the lithium battery;
(2) When the mains supply is powered off, the KD coil of the relay is powered off, the normally closed contact is closed, and at the moment, the pin 13 and the pin 15 of the SG3525 chip U1 are bias voltage access ends, so that the circuit obtains stable voltage and works normally;
(3) The pin 5 and the pin 6 of the SG3525 chip U1 are respectively an oscillator timing capacitor access end and a resistor access end, and a capacitor C1 with a proper capacitance value and a resistor R1 with a resistance value are selected to enable the circuit to generate square waves with a certain frequency;
(4) Pin 8 of SG3525 chip U1 is a soft start capacitor access terminal, and capacitor C2 with different capacitance values is selected to adjust the duty ratio of square wave;
(5) The pin 10 of the SG3525 chip U1 is a protection end, when the low level is connected, the SG3525 chip U1 has output, and when the high level is connected, the SG3525 chip U1 is forbidden to output;
(6) The pins 11 and 14 of the SG3525 chip U1 are complementary output ends, alternately output high and low levels, alternately control the on and off of the MOS transistor Q1 and the MOS transistor Q2, and output PWM waves with stable voltage and 180-degree phase difference;
(7) The step-up transformer steps up the PWM wave, and the converted AC220V is connected to the terminal R and the terminal S of the input end of the frequency converter and supplies power to the frequency converter;
(8) The DC5V voltage converted by the frequency converter is directly supplied to the main board, and then the main board outputs the DC5V voltage to the encoder, and the encoder works normally after being electrified; then the host band-type brake coil is opened, the host runs and slides, and the encoder transmits running information of the host to the main board.
The invention has the beneficial effects that: the invention overcomes the defect that the speed blind area appears in rescue because an operator cannot observe the specific state of the elevator under the condition of electric brake release rescue; an operator can limit the speed of the elevator by manually controlling the brake release action according to the display on the main board nixie tube or the display on the handheld operator, so that the elevator is kept in a low-speed range, and the rescue safety is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of an electric brake release system for an elevator according to the present invention.
Fig. 2 is an electrical schematic of fig. 1.
Fig. 3 is an electrical schematic diagram of the electric brake release device of fig. 1.
Detailed Description
The technical scheme of the present invention will be clearly and completely described in the following detailed description.
The invention relates to a novel electric brake release system for an elevator, which comprises an electric brake release device, a frequency converter, a main board, an encoder and a host brake coil; the specific structure is shown in fig. 1-3, the input end of the electric brake release device is connected with the commercial power, and the output end of the electric brake release device is respectively connected with the input end of the frequency converter and the main machine brake coil and respectively supplies power to the frequency converter and the main machine brake coil.
The electric brake release device comprises a charging transformer, a lithium battery, a square wave generating circuit, a step-up transformer and a control board; as shown in fig. 1 to 3, the input end of the charging transformer is electrically connected with the mains supply, and the output end of the charging transformer is electrically connected with the input end of the lithium battery and charges the lithium battery; wherein, the lithium battery adopts a 12V/7AH lithium battery; the charging transformer is of the type EI-41.
The output end of the lithium battery is electrically connected with the input end of the control board and provides stable voltage; wherein, the control panel adopts SG3525 chip U1; as shown in fig. 1 to 3, pin 15 of SG3525 chip U1 is a bias voltage access terminal, and is connected to the positive electrode of the output terminal of the lithium battery through capacitor C3; the pin 13 of the SG3525 chip U1 is a bias voltage access end and is connected to the negative electrode of the output end of the lithium battery through a relay KD; the capacitor C3 is used for stabilizing voltage, so that the circuit can work normally;
As shown in fig. 1 to 3, a pin 6 of the SG3525 chip U1 is connected to one end of a resistor R1; pin 5 of SG3525 chip U1 is the oscillator timing capacitor access terminal, and connect to one end of the capacitor C1; selecting a capacitor C1 with a proper capacitance value and a resistor R1 with a resistance value to enable a circuit to generate square waves with a certain frequency; the pin 7 of the SG3525 chip U1 is a discharge end of the oscillator, and a discharge resistor R2 is externally connected with the pin 5 of the SG3525 chip U1 to form a discharge loop; the pin 8 of the SG3525 chip U1 is connected to one end of the soft start capacitor C2, different capacitance values are selected, and the duty ratio of the square wave can be adjusted; the pin 10 of the SG3525 chip U1 is a protection end, when the low level is connected, the SG3525 chip U1 has output, and when the high level is connected, the SG3525 chip U1 prohibits output; pin 9 of SG3525 chip U1 is connected to one end of capacitor C4; pin 1 and pin 12 of SG3525 chip U1 are grounded; pin 14 of SG3525 chip U1 is connected to one end of resistor R3; the other ends of the resistor R1, the capacitor C1 and the capacitor C2 are grounded.
The output end of the control board is electrically connected with the input end of the square wave generating circuit, and the output end of the square wave generating circuit is electrically connected with the input end of the step-up transformer and outputs PWM waves; the step-up transformer is of the type EI30, and the terminal 7 and the terminal 10 of the step-up transformer are respectively connected with the input end of the frequency converter; as shown in fig. 1 to 3, the square wave generating circuit comprises a MOS transistor Q1, a MOS transistor Q2, a capacitor C5, a resistor R6 and a resistor R7; the drain electrode D of the MOS tube Q1 is respectively connected with one end of the capacitor C5 and the terminal 6 of the step-up transformer; the other end of the capacitor C5 is connected with one end of the resistor R7; the source electrode S of the MOS tube Q2 is grounded; the drain electrode D of the MOS tube Q2 is respectively connected with the other end of the resistor R7 and the terminal 1 of the step-up transformer;
As shown in fig. 1 to 3, the other ends of the pin 1 and the pin 10 of the SG3525 chip U1, and the resistor R1, the capacitor C2, and the capacitor C4 are respectively connected to the gate G of the MOS transistor Q1 through the resistor R5; the other ends of the pin 1, the pin 10, the resistor R1, the capacitor C2 and the capacitor C4 of the SG3525 chip U1 are respectively connected to the source S of the MOS tube Q1; pin 11 of SG3525 chip U1 is connected to gate G of MOS transistor Q1 through resistor R4; the other end of the resistor R3 is connected to the grid G of the MOS tube Q2; the other end of the resistor R3 is connected to a source electrode S of the MOS tube Q2 through a resistor R6; wherein, resistance R7 and electric capacity C5 are used for the steady voltage. In the invention, the pins 11 and 14 of the SG3525 chip U1 are two complementary output ends, alternately output high and low levels, alternately control the on and off of the MOS tube Q1 and the MOS tube Q2, and output PWM waves with stable voltage and 180-degree phase difference.
The output end of the step-up transformer is electrically connected with the input end of the frequency converter, and supplies power to the frequency converter; as shown in fig. 1-3, the frequency converter is of a model KLA100D, and its output end is connected with the input end of the motherboard through a thin flat cable and directly supplies power to the motherboard; the model adopted by the main board is KLA-MCD, and the output end of the main board is connected with the input end of the encoder through a thin flat cable and directly supplies power to the encoder; the model that the encoder adopted is ERN1387, and its output links to each other with the mainboard to feed back the operation information to the mainboard.
The invention discloses a use method of a novel electric brake release system for an elevator, which comprises the following steps:
(1) When commercial power exists, the relay KD is disconnected, and the AC220V commercial power charges the lithium battery;
(2) When the mains supply is powered off, the KD coil of the relay is powered off, the normally closed contact is closed, and at the moment, the pin 13 and the pin 15 of the SG3525 chip U1 are bias voltage access ends, so that the circuit obtains stable voltage and works normally;
(3) The pin 5 and the pin 6 of the SG3525 chip U1 are respectively an oscillator timing capacitor access end and a resistor access end, and a capacitor C1 with a proper capacitance value and a resistor R1 with a resistance value are selected to enable the circuit to generate square waves with a certain frequency;
(4) Pin 8 of SG3525 chip U1 is a soft start capacitor access terminal, and capacitor C2 with different capacitance values is selected to adjust the duty ratio of square wave;
(5) The pin 10 of the SG3525 chip U1 is a protection end, when the low level is connected, the SG3525 chip U1 has output, and when the high level is connected, the SG3525 chip U1 is forbidden to output;
(6) The pins 11 and 14 of the SG3525 chip U1 are complementary output ends, alternately output high and low levels, alternately control the on and off of the MOS transistor Q1 and the MOS transistor Q2, and output PWM waves with stable voltage and 180-degree phase difference;
(7) The step-up transformer steps up the PWM wave, and the converted AC220V is connected to the terminal R and the terminal S of the input end of the frequency converter and supplies power to the frequency converter;
(8) The DC5V voltage converted by the frequency converter is directly supplied to the main board, and then the main board outputs the DC5V voltage to the encoder, and the encoder works normally after being electrified; then the host band-type brake coil is opened, the host runs and slides, and the encoder transmits running information of the host to the main board.
The invention has the beneficial effects that: the invention overcomes the defect that the speed blind area appears in rescue because an operator cannot observe the specific state of the elevator under the condition of electric brake release rescue; an operator can limit the speed of the elevator by manually controlling the brake release action according to the display on the main board nixie tube or the display on the handheld operator, so that the elevator is kept in a low-speed range, and the rescue safety is ensured.
The above embodiments are merely illustrative of the preferred embodiments of the present invention, and the present invention is not limited to the above embodiments, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the design concept of the present invention should fall within the protection scope of the present invention, and the claimed technical content of the present invention is fully described in the claims.
Claims (7)
1. Novel electric brake release system for elevator is characterized in that: the electric brake release device comprises an electric brake release device, a frequency converter, a main board, an encoder and a main machine brake coil; the input end of the electric brake release device is connected with the mains supply, and the output end of the electric brake release device is respectively connected with the input end of the frequency converter and the main machine brake coil and respectively supplies power to the frequency converter and controls the main machine brake coil; the output end of the frequency converter is connected with the input end of the main board and supplies power to the main board; the output end of the main board is connected with the input end of the encoder and supplies power to the encoder; the output end of the encoder is connected with the main board and feeds back operation information to the main board;
The electric brake release device comprises a charging transformer, a lithium battery, a square wave generating circuit, a step-up transformer and a control board; the input end of the charging transformer is electrically connected with the mains supply, and the output end of the charging transformer is electrically connected with the input end of the lithium battery and charges the lithium battery; the output end of the lithium battery is electrically connected with the input end of the control board and provides stable voltage; the output end of the control board is electrically connected with the input end of the square wave generating circuit, and the output end of the square wave generating circuit is electrically connected with the input end of the step-up transformer and outputs PWM waves; the output end of the step-up transformer is electrically connected with the input end of the frequency converter and supplies power to the frequency converter;
The control board adopts an SG3525 chip U1; the pin 15 of the SG3525 chip U1 is connected to the positive electrode of the output end of the lithium battery through a capacitor C3; pin 13 of SG3525 chip U1 is connected to the negative electrode of the output terminal of the lithium battery through relay KD; the pin 5 and the pin 7 of the SG3525 chip U1 are connected through a resistor R2, and form a discharge loop; pin 6 of SG3525 chip U1 is connected to one end of resistor R1; pin 5 of SG3525 chip U1 is connected to one end of capacitor C1; pin 8 of SG3525 chip U1 is connected to one end of capacitor C2; pin 9 of SG3525 chip U1 is connected to one end of capacitor C4; pin 1 and pin 12 of SG3525 chip U1 are grounded; pin 14 of SG3525 chip U1 is connected to one end of resistor R3; the other ends of the resistor R1, the capacitor C1 and the capacitor C2 are grounded;
The model adopted by the encoder is ERN1387.
2. The novel electric brake release system for an elevator according to claim 1, wherein: the square wave generating circuit comprises a MOS tube Q1, a MOS tube Q2, a capacitor C5, a resistor R6 and a resistor R7; the drain electrode D of the MOS tube Q1 is respectively connected with one end of the capacitor C5 and the terminal 6 of the step-up transformer; the other end of the capacitor C5 is connected with one end of the resistor R7; the source electrode S of the MOS tube Q2 is grounded; the drain D of the MOS transistor Q2 is connected to the other end of the resistor R7 and to the terminal 1 of the step-up transformer.
3. The novel electric brake release system for an elevator according to claim 2, wherein: the other ends of the pin 1, the pin 10, the resistor R1, the capacitor C2 and the capacitor C4 of the SG3525 chip U1 are respectively connected to the grid G of the MOS tube Q1 through a resistor R5; the other ends of the pin 1, the pin 10, the resistor R1, the capacitor C2 and the capacitor C4 of the SG3525 chip U1 are respectively connected to the source S of the MOS tube Q1; pin 11 of SG3525 chip U1 is connected to gate G of MOS transistor Q1 through resistor R4; the other end of the resistor R3 is connected to the grid G of the MOS tube Q2; the other end of the resistor R3 is connected to the source S of the MOS transistor Q2 through a resistor R6.
4. The novel electric brake release system for an elevator according to claim 1, wherein: the lithium battery adopts a 12V/7AH lithium battery; the charging transformer is of the type EI-41; the step-up transformer is of the type EI30, and the terminal 7 and the terminal 10 of the step-up transformer are respectively connected with the input end of the frequency converter.
5. The novel electric brake release system for an elevator according to claim 1, wherein: the model of the frequency converter is KLA100D, and the frequency converter directly supplies power to the main board through a thin flat cable.
6. The novel electric brake release system for an elevator according to claim 1, wherein: the model of the main board is KLA-MCD, and the encoder is directly powered by the fine flat cable.
7. The application method of the novel electric brake release system for the elevator is characterized by comprising the following steps of:
(1) When commercial power exists, the relay KD is disconnected, and the AC220V commercial power charges the lithium battery;
(2) When the mains supply is powered off, the KD coil of the relay is powered off, the normally closed contact is closed, and at the moment, the pin 13 and the pin 15 of the SG3525 chip U1 are bias voltage access ends, so that the circuit obtains stable voltage and works normally;
(3) The pin 5 and the pin 6 of the SG3525 chip U1 are respectively an oscillator timing capacitor access end and a resistor access end, and a capacitor C1 with a proper capacitance value and a resistor R1 with a resistance value are selected to enable the circuit to generate square waves with a certain frequency;
(4) Pin 8 of SG3525 chip U1 is a soft start capacitor access terminal, and capacitor C2 with different capacitance values is selected to adjust the duty ratio of square wave;
(5) The pin 10 of the SG3525 chip U1 is a protection end, when the low level is connected, the SG3525 chip U1 has output, and when the high level is connected, the SG3525 chip U1 is forbidden to output;
(6) The pins 11 and 14 of the SG3525 chip U1 are complementary output ends, alternately output high and low levels, alternately control the on and off of the MOS transistor Q1 and the MOS transistor Q2, and output PWM waves with stable voltage and 180-degree phase difference;
(7) The step-up transformer steps up the PWM wave, and the converted AC220V is connected to the terminal R and the terminal S of the input end of the frequency converter and supplies power to the frequency converter;
(8) The DC5V voltage converted by the frequency converter is directly supplied to the main board, and then the main board outputs the DC5V voltage to the encoder, and the encoder works normally after being electrified; then the host band-type brake coil is opened, the host runs and slides, and the encoder transmits running information of the host to the main board.
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| CN202010376074.0A CN111547594B (en) | 2020-05-07 | 2020-05-07 | Novel electric brake release system for elevator and application method thereof |
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| CN202010376074.0A CN111547594B (en) | 2020-05-07 | 2020-05-07 | Novel electric brake release system for elevator and application method thereof |
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| CN111547594B true CN111547594B (en) | 2024-05-07 |
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| WO2019223646A1 (en) * | 2018-05-21 | 2019-11-28 | 浙江正泰电器股份有限公司 | Frequency converter |
| CN212668898U (en) * | 2020-05-07 | 2021-03-09 | 康力电梯股份有限公司 | Novel elevator electric brake release system |
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| CN207418071U (en) * | 2017-11-22 | 2018-05-29 | 怡达快速电梯有限公司 | A kind of electric brake releasing device |
| WO2019223646A1 (en) * | 2018-05-21 | 2019-11-28 | 浙江正泰电器股份有限公司 | Frequency converter |
| CN212668898U (en) * | 2020-05-07 | 2021-03-09 | 康力电梯股份有限公司 | Novel elevator electric brake release system |
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| CN111547594A (en) | 2020-08-18 |
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