CN114044429A - Circuit structure for controlling brake of elevator traction machine by using PTC - Google Patents
Circuit structure for controlling brake of elevator traction machine by using PTC Download PDFInfo
- Publication number
- CN114044429A CN114044429A CN202111273415.2A CN202111273415A CN114044429A CN 114044429 A CN114044429 A CN 114044429A CN 202111273415 A CN202111273415 A CN 202111273415A CN 114044429 A CN114044429 A CN 114044429A
- Authority
- CN
- China
- Prior art keywords
- ptc
- band
- type brake
- brake
- follow current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/02—Details
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
Abstract
The invention discloses a circuit structure for controlling an elevator traction machine brake by using a PTC, which comprises a brake control switch, a diode and a follow current resistor, wherein a brake braking coil is connected to the output end of the brake control circuit through the brake control switch, the cathode of the diode is connected to the connection end of the brake control switch and the brake braking coil, the anode of the diode is connected with one end of the follow current resistor, the other end of the follow current resistor is connected to the other end of the brake braking coil, and the PTC is connected in parallel to the follow current resistor. The change relation between the resistance and the temperature of the PTC is nonlinear, and the equivalent resistance value of the brake freewheeling resistor is changed by utilizing the characteristic of the PTC positive temperature coefficient.
Description
Technical Field
The invention relates to the technical field of elevator traction machine band-type brake control, in particular to a circuit structure for controlling an elevator traction machine band-type brake by using a PTC (positive temperature coefficient) to control noise generated during the traction machine band-type brake.
Background
Noise is generated when the tractor is contracting the brake, and the noise is caused by the fact that a contracting brake braking device contacts the wheel surface of a traction wheel. The speed of the brake device is related to the freewheeling resistor in the braking circuit. Therefore, the noise can be effectively controlled by controlling the follow current resistor. However, if the follow current resistance is reduced to reduce the noise, the problem arises that the contracting brake speed becomes slow and the distance traveled after contracting brake becomes too long. If the resistance value of the follow current resistor is fixed, the balance between the traveling distance and the noise can be inevitably obtained.
For this reason, CN109802602A discloses a band-type brake follow current circuit, a band-type brake braking system and a band-type brake follow current control method. The brake freewheeling circuit comprises a first freewheeling module and a second freewheeling module which are connected in parallel. The equivalent resistance value of the first freewheeling module is smaller than that of the second freewheeling module. The positive ends of the first follow current module and the second follow current module are both used for being connected to the positive end of the band-type brake coil. The negative ends of the first follow current module and the second follow current module are both used for being connected to the negative end of the band-type brake coil. The first follow current module is used for being switched on when receiving a closing control signal when the brake starts to be released, performing follow current on a brake coil and being switched off when receiving an open circuit control signal after a brake shoe impacts a wheel surface of a main engine. The second afterflow module is used for afterflow of the brake coil after the first afterflow module is disconnected. Through the design of the double follow current loop, the resistance value of the follow current loop in the release process of the band-type brake is adjustable, and the maximum noise of the release of the band-type brake is effectively reduced and the release time is shortened.
However, the first freewheel resistor of the brake freewheel circuit needs to be switched on and off by a closing control signal when the brake is released and an opening control signal after the brake shoe impacts the wheel surface of the main engine, and the brake freewheel circuit has the problems of complex control circuit and high cost.
Disclosure of Invention
The invention aims to solve the technical problems that the conventional circuit structure for controlling the band-type brake of the elevator tractor by using the PTC is simple in structure and low in cost and aims to solve the problems that the band-type brake speed is slow and the running distance after the band-type brake is too long due to the fact that noise generated when the band-type brake of the tractor is controlled by the resistance value of a follow-current resistor, and the first follow-current resistor of a band-type brake follow-current circuit in the prior art needs a closing control signal when the band-type brake starts to release and an opening control signal after a brake shoe impacts a wheel surface of a main machine to conduct and break.
In order to achieve the purpose, the circuit structure for controlling the band-type brake of the elevator traction machine by using the PTC comprises a band-type brake control switch, a diode and a follow current resistor, wherein the band-type brake coil is connected to the output end of the band-type brake control circuit through the band-type brake control switch, the negative electrode of the diode is connected to the connecting end of the band-type brake control switch and the band-type brake coil, the positive electrode of the diode is connected with one end of the follow current resistor, and the other end of the follow current resistor is connected to the other end of the band-type brake coil.
In a preferred embodiment of the invention, the resistance of the PTC is non-linear with respect to temperature.
In a preferred embodiment of the invention, the PTC is a positive temperature coefficient PTC. By adopting the technical scheme, the impedance of the PTC of the brake pad changes in a nonlinear way and changes along with time, and when follow current flows through the PTC, the temperature of the PTC can be raised, so that the equivalent resistance value of the brake follow current resistor is changed by utilizing the characteristic of the PTC positive temperature coefficient, and the control is not required to be carried out by a closing control signal when the brake is released and an open control signal after a brake shoe impacts a wheel surface of a host, so that the circuit structure is simple, and the cost is low.
Drawings
Fig. 1 is an electrical schematic diagram of a circuit structure for controlling an elevator traction machine band-type brake using a PTC.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
Referring to fig. 1, the circuit structure for controlling the band-type brake of the elevator traction machine by using the PTC comprises a band-type brake control switch, a diode, a freewheeling resistor and the PTC, wherein the PTC is a positive temperature coefficient PTC.
The contracting brake Coil is connected to an output end P, N of the contracting brake control circuit through a contracting brake control switch K1, the cathode of a diode D is connected to the connecting end of the contracting brake control switch K1 and the contracting brake Coil, the anode of the diode D is connected with one end of a follow current resistor R, the other end of the follow current resistor R is connected to the other end of the contracting brake Coil, and the PTC is connected to the follow current resistor R in parallel.
The variation relationship between the resistance and temperature of the PTC is non-linear and changes with time, when the follow current flows through the PTC, the temperature of the PTC is raised, so that the resistance of the heat sensitive material with PTC positive temperature coefficient is adopted to achieve the variable follow current resistance. The nonlinear equivalent follow current resistor achieves the effect of considering both the running distance and the contracting brake noise. The method comprises the following steps:
since the PTC resistor is small at first, the equivalent resistance in parallel with the follow current group R is small, and therefore the follow current is large. When a large current flows through the PTC, the temperature of the PTC rises, the resistance rises, and the equivalent resistance of the PTC in parallel with the follow-current group R is large, so that the follow-current is small. Therefore, the PTC band-type brake is connected with the follow current group R in parallel, so that the effect of considering both the running distance and the band-type brake noise can be achieved at the beginning with large current and later with small current without software control.
Claims (3)
1. The utility model provides an use circuit structure of PTC control elevator hauler band-type brake, includes band-type brake control switch, diode, freewheel resistance, band-type brake coil passes through band-type brake control switch and connects on band-type brake control circuit's output, the negative pole of diode connect band-type brake control switch with on band-type brake coil's the connecting end, the positive pole of diode with freewheel resistance's one end is connected, the other end of freewheel group is connected on band-type brake coil's the other end, its characterized in that still includes a PTC, PTC connects in parallel on freewheel resistance.
2. The circuit structure of controlling an elevator traction machine band-type brake using a PTC according to claim 1, wherein a variation relationship between the resistance and the temperature of the PTC is non-linear.
3. The circuit structure for controlling an elevator traction machine band-type brake using a PTC according to claim 1, wherein the PTC is a positive temperature coefficient PTC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111273415.2A CN114044429A (en) | 2021-10-29 | 2021-10-29 | Circuit structure for controlling brake of elevator traction machine by using PTC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111273415.2A CN114044429A (en) | 2021-10-29 | 2021-10-29 | Circuit structure for controlling brake of elevator traction machine by using PTC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114044429A true CN114044429A (en) | 2022-02-15 |
Family
ID=80206548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111273415.2A Pending CN114044429A (en) | 2021-10-29 | 2021-10-29 | Circuit structure for controlling brake of elevator traction machine by using PTC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114044429A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1979000355A1 (en) * | 1977-12-08 | 1979-06-28 | Lucas Industries Ltd | Control system for a d.c. motor |
| CN202175481U (en) * | 2011-07-18 | 2012-03-28 | 北京升华电梯集团有限公司 | Contracting brake muting circuit of tractor |
| CN203545571U (en) * | 2013-11-07 | 2014-04-16 | 昆山京都电梯有限公司 | Elevator brake optimization circuit |
| CN204465393U (en) * | 2015-03-25 | 2015-07-08 | 珠海格力电器股份有限公司 | A kind of motor powder for lowering blood pressure heater circuit |
| CN109802602A (en) * | 2019-03-08 | 2019-05-24 | 日立电梯（中国）有限公司 | Band-type brake freewheeling circuit, brake sticking brake system and band-type brake afterflow control method |
| CN209052257U (en) * | 2018-11-05 | 2019-07-02 | 合普动力股份有限公司 | Elevator traction machine with automatic cooling function |
| US20220299081A1 (en) * | 2020-03-06 | 2022-09-22 | Altra Industrial Motion (Shenzhen) Co.,Ltd. | Electromagnetic Brake Control Apparatus |
-
2021
- 2021-10-29 CN CN202111273415.2A patent/CN114044429A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1979000355A1 (en) * | 1977-12-08 | 1979-06-28 | Lucas Industries Ltd | Control system for a d.c. motor |
| CN202175481U (en) * | 2011-07-18 | 2012-03-28 | 北京升华电梯集团有限公司 | Contracting brake muting circuit of tractor |
| CN203545571U (en) * | 2013-11-07 | 2014-04-16 | 昆山京都电梯有限公司 | Elevator brake optimization circuit |
| CN204465393U (en) * | 2015-03-25 | 2015-07-08 | 珠海格力电器股份有限公司 | A kind of motor powder for lowering blood pressure heater circuit |
| CN209052257U (en) * | 2018-11-05 | 2019-07-02 | 合普动力股份有限公司 | Elevator traction machine with automatic cooling function |
| CN109802602A (en) * | 2019-03-08 | 2019-05-24 | 日立电梯（中国）有限公司 | Band-type brake freewheeling circuit, brake sticking brake system and band-type brake afterflow control method |
| US20220299081A1 (en) * | 2020-03-06 | 2022-09-22 | Altra Industrial Motion (Shenzhen) Co.,Ltd. | Electromagnetic Brake Control Apparatus |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
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Application publication date: 20220215 |