CN110289773A - Elevator brake power supply, control method and elevator system - Google Patents

Abstract

The present invention discloses a kind of elevator internal contracting brake power supply, control method and elevator device, and elevator internal contracting brake power supply includes: first voltage conversion module, and for connecting alternating current, the output end of first voltage conversion module is connect the input terminal of first voltage conversion module with contracting brake；The input terminal of current sampling module, current sampling module is connect with the output end of first voltage conversion module, and the output end of current sampling module and the sample rate current input terminal of elevator system controller connect；First switch module, the control terminal of first switch module and the first control signal output end of elevator system controller connect, for adjusting the output electric current of first voltage conversion module according to first control signal, existing band-type brake power supply electric current in high and low temperature can be eliminated deviation occur elevator device is caused to be likely to occur dragging lock to run or the problem of report an error, and the contracting brake of all different rated operational currents on the market can be adapted to automatically.

Description

Elevator brake power supply, control method and elevator system

technical field

The invention relates to the field of elevators, in particular to an elevator brake power supply, a control method and an elevator system.

Background technique

The holding brake is an electromechanical device that prevents the elevator from moving again when the elevator car is at rest and the motor is de-energized.

At present, domestic elevator manufacturers generally use silicon controlled rectifiers to chop AC power into DC current and rectify AC power into DC power, and then use BUCK circuit to transform into required DC power.

During the working process of the elevator, due to the influence of factors such as the internal device error of the brake power supply, the deviation of the use environment, and the deviation of the system power supply voltage, the output current of the brake power supply may fluctuate greatly, which will cause the brake to work abnormally. Or the temperature rise of the brake power supply is too high and other problems do not meet the safety requirements.

Contents of the invention

The invention provides an elevator brake power supply, a control method and an elevator system, which can eliminate the problem that the existing brake power supply may cause dragging operation or error reporting in the elevator system due to current deviations under high and low temperature conditions, and can automatically adapt to the market. All holding brakes with different rated operating currents.

In a first aspect, the present invention provides an elevator brake power supply, which includes:

A first voltage conversion module, the input end of the first voltage conversion module is used to connect to the mains, and the output end of the first voltage conversion module is connected to the brake;

A current sampling module, the input end of the current sampling module is connected to the output end of the first voltage conversion module, and the output end of the current sampling module is connected to the sampling current input end of the elevator system controller;

A first switch module, the control terminal of the first switch module is connected to the first control signal output terminal of the elevator system controller, and is used for adjusting the output current of the first voltage conversion module according to the first control signal.

Optionally, the secondary coil of the first voltage conversion module is provided with at least one center tap, the first end of the secondary coil is connected to the power input end of the brake, and the second end of the secondary coil is The two terminals are connected with the center tap and the ground terminal of the brake.

Optionally, the elevator brake power supply also includes a second voltage conversion module, a second switch module, an energy storage module, and a control chip;

The first end of the primary coil of the first voltage conversion module is connected to the mains, and the second end of the primary coil of the first voltage conversion module is connected to the first end of the first switch module;

The second end of the first switch module is connected to the first end of the second switch module, the second end of the second switch module is connected to the first input end of the second voltage conversion module, and the The second input end of the second voltage conversion module is connected to the first end of the energy storage module, and the second end of the energy storage module is connected to the second end of the first switch module;

The output end of the second voltage conversion module is connected to the power input end of the elevator system controller.

Optionally, the ground terminal of the second voltage conversion module is connected to the ground terminal of the brake.

Optionally, the elevator brake power supply also includes a first closing switch module and at least one second closing switch module, the first closing switch module is connected to the second end of the secondary coil and the brake Between the grounding terminals of the brake, the second closing switch module is connected between the center tap and the grounding terminal of the brake, and the control terminal of the first closing switch module is connected to the second closing switch module. The control terminals of the road switch modules are respectively connected with the elevator system controller.

Optionally, the elevator brake power supply also includes a first sampling resistor and at least one second sampling resistor, the first sampling resistor is connected between the second end of the secondary coil and the grounding end of the brake Between, the second sampling resistor is connected between the center tap and the ground terminal of the brake;

The current sampling module includes a first current sampling unit and at least one second current sampling unit;

The first current sampling unit is connected in parallel with the first sampling resistor, and the second current sampling unit is connected in parallel with the corresponding second sampling resistor;

The sampling current output terminals of the first current sampling unit and the second current sampling unit are connected to the sampling current input terminal of the elevator system controller.

Optionally, the elevator brake power supply also includes an electromagnetic interference filtering module and a rectification filtering module, the input end of the electromagnetic interference filtering module is connected to the mains, and the output end of the electromagnetic interference filtering module is connected to the rectification filtering module The input end of the rectification and filtering module is connected to the input end of the first voltage conversion module.

In a second aspect, the present invention provides a control method for an elevator brake power supply. Based on the elevator brake power supply provided in the first aspect of the present invention, the method includes:

Obtain the working current information of the brake through the current sampling module;

Outputting a first control signal to the first switch module based on the working current information to adjust the output current of the first voltage conversion module.

Optionally, the outputting the first control signal to the first switch module based on the working current information includes:

determining the operating current value of the holding brake according to the operating current information;

Generate a first control signal according to the operating current value, and output the first control signal to the first switch module.

Optionally, the working current value is used to determine the duty ratio of the first control signal, and the generating the first control signal according to the working current value includes:

If the operating current value is less than the preset current value, increasing the duty cycle of the first control signal, and generating the first control signal according to the increased duty cycle;

If the operating current value is greater than the current value, then reduce the duty cycle of the first control signal, and generate the first control signal according to the reduced duty cycle.

Optionally, the elevator brake power supply also includes a first closing switch module and at least one second closing switch module;

Before obtaining the working current information of the holding brake through the current sampling module, it also includes:

Determine the adaptive voltage information of the holding brake;

Based on the adaptive voltage information, the first combining switch or at least one second combining switch is controlled to be turned on, so that the first voltage conversion module outputs a voltage adapted to the brake.

In a third aspect, the present invention provides an elevator system, including the elevator brake power supply provided in the first aspect of the present invention.

In the elevator brake power supply, control method and elevator system provided by the present invention, the current sampling module collects the working current information of the brake, and the elevator system controller analyzes the working current information to obtain the working current value of the brake, and based on the The relationship between the working current value and the preset current value, adjust the duty ratio of the first control signal to adjust the conduction time of the first switch module, and then adjust the conduction time of the first voltage conversion module to adjust the first voltage conversion module The output current (that is, the working current when the brake is working) makes it meet the preset current value. It can compensate the current deviation caused by the error of the brake power supply and the difference between the cold and hot states of the brake brake, and eliminate the current deviation of the existing brake power supply under high and low temperature conditions, which may cause the elevator system to drag the brake or report an error. The process is fully automated and intelligent without manual intervention. In addition, the elevator system controller can set a preset current value according to the parameter information of the brake, and can automatically adapt to all brakes with different rated operating currents on the market.

Description of drawings

The present invention will be described in further detail below according to the drawings and embodiments.

Fig. 1 is a structural block diagram of an elevator brake power supply provided by an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of another elevator brake power supply provided by the embodiment of the present invention;

Fig. 3 is a flow chart of a control method for an elevator brake power supply provided by an embodiment of the present invention;

Fig. 4 is a flow chart of another method for controlling the power supply of an elevator brake provided by an embodiment of the present invention.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

An embodiment of the present invention provides an elevator brake power supply, which is used to supply power to an elevator brake. Figure 1 is a structural block diagram of an elevator brake power supply provided by an embodiment of the present invention. The elevator brake power supply includes a first voltage Transformation module 110 , current sampling module 200 and first switch module 310 .

The input terminal of the first voltage conversion module 110 is used to connect to the mains, and the output terminal of the first voltage conversion module 110 is connected to the brake 400 . Among them, the mains is what we call power frequency alternating current (AC), which is characterized by three commonly used quantities of alternating current: voltage, current, and frequency. There are 50Hz (Hertz) and 60Hz (Hertz) commonly used AC power frequency in various countries in the world, and the civilian AC voltage distribution ranges from 100V to 380V. Specifically, in this embodiment, the commercial power is 50 Hz, 220V alternating current. The first voltage conversion module 110 is used for converting the mains power into a voltage value required by the brake 400 .

The input end of the current sampling module 200 is connected to the output end of the first voltage conversion module 110 , and the output end of the current sampling module 200 is connected to the sampling current input end of the elevator system controller 510 . The current sampling module 200 is used to collect the output current information of the output terminal of the first voltage conversion module 110, that is, the working current information of the holding brake 400 when it is working, and send the collected working current information of the holding brake 400 to the elevator system controller 510, wherein the working current information of the holding brake 400 includes the working current value when the holding brake 400 is working.

The control terminal of the first switch module 310 is connected to the first control signal output terminal of the elevator system controller 510 for adjusting the output current of the first voltage conversion module 110 according to the first control signal. Specifically, by adjusting the duty ratio of the first control signal, the on-off of the first switch module 310 is controlled, and then the power-on time of the first voltage conversion module 110 is controlled, thereby adjusting the output current of the first voltage conversion module 110 (hold The operating current when the brake 400 works). Wherein, the duty ratio (Duty Ratio) refers to the ratio of the power-on time to the total time within a pulse cycle.

During the working process of the brake power supply, the output current of the brake power supply may fluctuate greatly due to the influence of factors such as the internal device error of the brake power supply, the deviation of the operating environment, and the deviation of the system power supply voltage. Temperature will affect the working current of the holding brake. For example, the temperature rise will cause the resistance of the holding brake coil to increase, which will reduce the working current of the holding brake, which may cause the holding brake to report an error or fail to work normally, affecting the operation of the elevator.

In view of the above problems, the working process of the elevator brake power supply provided by the embodiment of the present invention is as follows:

After the elevator brake power supply is powered on, the first voltage conversion module 110 converts the mains power into the voltage value required by the brake brake 400, and supplies power to the brake brake 400; at the same time, the current sampling module 200 collects the operating current of the brake brake 400 information, and send the working current information to the elevator system controller 510, the elevator system controller 510 analyzes the working current information, obtains the working current value of the holding brake 400, and compares the working current value with the preset current value , if the operating current value is less than the preset current value, increase the duty cycle of the first control signal, and generate the first control signal according to the increased duty cycle, increase the conduction time of the first switch module 310, and then increase the second The power-on time of a voltage conversion module 110, and then increase the working current of the brake 400 when it is working, so that it meets the preset current value; if the working current value is greater than the preset current value, then reduce the duty cycle of the first control signal , and generate the first control signal according to the reduced duty cycle, reduce the conduction time of the first switch module 310, further reduce the conduction time of the first voltage conversion module 110, and further reduce the working current of the holding brake 400 when it is working , so that it meets the preset current value.

The above adjustment process may adopt a classical proportional-integral-differential (Proportion-Integral-Differential, PID) control adjustment method.

To sum up, the elevator system controller 510 can adjust the duty cycle of the first control signal according to the working current information of the brake 400 collected by the current sampling module 200, so as to adjust the conduction time of the first switch module 310, and then adjust the second control signal. The power-on time of the first voltage conversion module 110 is used to adjust the output current of the first voltage conversion module 110 (ie, the working current when the brake 400 is working).

At present, the elevator systems on the market use a variety of traction motor powers, and there are even more types of brakes that match the traction motors. A variety of traction motors have spawned a variety of brakes, and different brakes need to be driven by different brake power sources. At present, the rated working current of the brakes on the market varies from 0.5A to 10A, and the existing elevator brake power supply cannot adapt to the brakes with various rated currents.

In view of the above problems, in the embodiment of the present invention, the preset current value can be preset according to the required rated current value of the holding brake 400 . Optionally, in the embodiment of the present invention, the holding brake 400 is connected to the elevator system controller 510. After the elevator system is powered on, the elevator system controller 510 obtains the parameter information of the holding brake 400 (including the required rated current value), and set the rated current value as the preset current value. In this way, it can automatically adapt to all holding brakes with different rated operating currents on the market.

In the elevator brake power supply provided by the embodiment of the present invention, the current sampling module collects the working current information of the brake, and the elevator system controller analyzes the working current information to obtain the working current value of the brake, and based on the working current value and Preset the relationship of the current value, adjust the duty ratio of the first control signal to adjust the conduction time of the first switch module, and then adjust the conduction time of the first voltage conversion module to adjust the output current of the first voltage conversion module ( That is, the operating current when the brake is working), so that it meets the preset current value. It can compensate the current deviation caused by the error of the brake power supply and the difference between the cold and hot states of the brake brake, and eliminate the current deviation of the existing brake power supply under high and low temperature conditions, which may cause the elevator system to drag the brake or report an error. The process is fully automated and intelligent without manual intervention. In addition, the elevator system controller can set a preset current value according to the parameter information of the brake, and can automatically adapt to all brakes with different rated operating currents on the market.

At present, the elevator systems on the market use a variety of traction motor powers, and there are even more types of brakes that match the traction motors. A variety of traction motors have spawned a variety of brakes, and different brakes need to be driven by different brake power sources. At present, the driving voltage of the holding brakes on the market is divided into two levels of 55V or 110V. The existing elevator holding brake power supply cannot adapt to the holding brakes of the two driving voltages.

In view of the above problems, optionally, the first voltage conversion module includes a primary coil and a secondary coil, the secondary coil of the first voltage conversion module is provided with at least one center tap, and the first end of the secondary coil is connected to the power supply of the brake. The input terminal is connected, and the second terminal of the secondary coil is connected with the center tap and the ground terminal of the brake. Fig. 2 is a structural schematic diagram of another elevator brake power supply provided by the embodiment of the present invention. As shown in Fig. 2, the secondary coil is provided with a center tap, so that by adjusting the number of turns of the secondary coil and the position of the center tap , the first voltage conversion module 110 can output two different output voltages of 55V and 110V, so as to adapt to the brakes with two driving voltages on the market. The first end of the secondary coil is connected to the power input end of the brake 400 , and the second end of the secondary coil is connected to the center tap and the ground terminal GND of the brake 400 .

Optionally, as shown in Figure 2, the elevator brake power supply also includes a first closing switch module 601 and a second closing switch module 602, the first closing switch module 601 is connected to the second end of the secondary coil and the ground terminal GND of the holding brake 400, the second closing switch module 602 is connected between the center tap and the grounding terminal GND of the holding brake 400, and the control terminal of the first closing switch module 601 is connected to the second closing The control terminals of the switch module 602 are respectively connected with the elevator system controller 510 . Specifically, after the elevator system is powered on, the elevator system controller 510 obtains the parameter information (including the required driving voltage value) of the brake 400, and controls the first closing switch module 601 or the second closing switch module 601 according to the required driving voltage value. The two-combining switch module 602 is turned on and off to control the output voltage of the first voltage conversion module 110 . Exemplarily, when the acquired required driving voltage value is 110V, the elevator system controller 510 controls the first combined switch module 601 to be turned on, the second combined switch module 602 to be turned off, and the first voltage conversion module 110 The output voltage is 110V; when the obtained required driving voltage value is 55V, the elevator system controller 510 controls the first closing switch module 601 to be turned off, the second closing switch module 602 is turned on, and the first voltage conversion module 110 The output voltage is 55V.

Optionally, the first combiner switch module 601 and the second combiner switch module 602 may be electronic switches such as MOS switch tubes, switch transistors, or IGBT switch tubes.

Exemplarily, as shown in Figure 2, the elevator brake power supply also includes an electromagnetic interference filtering module 700 and a rectification filtering module 800, the input end of the electromagnetic interference filtering module 700 is connected to the mains, and the output end of the electromagnetic interference filtering module 700 It is connected to the input end of the rectification and filtering module 800 , and the output end of the rectification and filtering module 800 is connected to the input end of the first voltage conversion module 110 . The electromagnetic interference filtering module 700 is used to filter out the interference from the grid and prevent the interference inside the elevator brake power supply from polluting the grid. The rectification and filtering module 800 converts the mains power into the DC power required by the first voltage conversion module 110 .

Exemplarily, as shown in FIG. 2 , the elevator brake power supply further includes a second voltage conversion module 120 , a second switch module 320 , an energy storage module 900 and a control chip 520 .

The first end of the primary coil of the first voltage conversion module 110 is connected to the mains, specifically, the output end of the rectification and filtering module 800, and the second end of the primary coil of the first voltage conversion module 110 is connected to the first switch module 310. The first end is connected.

The second end of the first switch module 310 is connected to the first end of the second switch module 320, the second end of the second switch module 320 is connected to the first input end of the second voltage conversion module 120, and the second voltage conversion module 120 The second input terminal of is connected to the first terminal of the energy storage module 900 , and the second terminal of the energy storage module 900 is connected to the second terminal of the first switch module 310 .

The output end of the second voltage conversion module 120 is connected to the power input end of the elevator system controller 510 .

Specifically, after the elevator system is powered on, the control chip 520 controls the second switch module 320 to be turned on, and the second voltage conversion module 120 converts the direct current from the rectification and filtering module 800 into the direct current required by the elevator system controller 510. The controller 510 supplies power, and the working process after the elevator system controller 510 is powered on has been described in detail in the above-mentioned embodiments, and will not be repeated here.

Optionally, the first switch module 310 and the second switch module 320 may be electronic switches such as MOS switch tubes, switch transistors, or IGBT switch tubes. The energy storage module 900 may be an energy storage capacitor.

Exemplarily, the ground terminal of the second voltage conversion module 120 is connected to the ground terminal of the brake 400 . That is, the first voltage conversion module 110 and the second voltage conversion module 120 share the same ground, so that they have the same reference potential, which reduces the extra cost caused by non-common ground.

Exemplarily, as shown in FIG. 2 , the elevator brake power supply also includes a first sampling resistor R1 and a second sampling resistor R2, and the first sampling resistor R1 is connected between the second end of the secondary coil and the brake 400 Between the ground terminal GND, the second sampling resistor R2 is connected between the center tap and the ground terminal GND of the brake 400 .

The current sampling module 200 includes a first current sampling unit 210 and a second current sampling unit 220 . The first current sampling unit 210 is connected in parallel with the first sampling resistor R1 for collecting the current of the first sampling resistor R1; the second current sampling unit 220 is connected in parallel with the second sampling resistor R2 for collecting the current of the second sampling resistor R2 , and send the current information to the elevator system controller 510.

The sampling current output terminals of the first current sampling unit 210 and the second current sampling unit 220 are connected to the sampling current input terminal of the elevator system controller 510 .

Specifically, the elevator system controller 510 controls the first combined switch module 601 to be turned on, and when the second combined switch module 602 is turned off, the first current sampling unit 210 collects the current of the first sampling resistor R1 and sends the current information to to the elevator system controller 510; when the elevator system controller 510 controls the first closing switch module 601 to be disconnected and the second closing switch module 602 to be turned on, the second current sampling unit 220 collects the current of the second sampling resistor R2, And send the current information to the elevator system controller 510.

The embodiment of the present invention also provides a control method for the elevator brake power supply. Based on the elevator brake power supply provided in the above-mentioned embodiments of the present invention, FIG. 3 is a flow chart of a control method for the elevator brake power supply provided by the embodiment of the present invention Figure, as shown in Figure 3, the method includes:

S100. Obtain the working current information of the holding brake through the current sampling module.

Specifically, after the elevator brake power supply is powered on, the first voltage conversion module 110 converts the mains power into the voltage value required by the brake 400 to supply power to the brake 400; at the same time, the current sampling module 200 collects the voltage value of the brake 400. The working current information is sent to the elevator system controller 510.

S200. Output a first control signal to the first switch module based on the working current information, so as to adjust the output current of the first voltage conversion module.

Optionally, step S200, outputting the first control signal to the first switch module based on the working current information, includes the following steps:

S210. Determine the working current value of the holding brake according to the working current information.

Specifically, after acquiring the working current information of the holding brake, the elevator system controller 510 analyzes the working current information to obtain the working current value of the holding brake 400 .

S220. Generate a first control signal according to the working current value, and output the first control signal to the first switch module.

Optionally, the working current value is used to determine the duty ratio of the first control signal, and the first control signal is generated according to the working current value, including:

If the operating current value is less than the preset current value, increasing the duty cycle of the first control signal, and generating the first control signal according to the increased duty cycle;

If the operating current value is greater than the current value, then reduce the duty cycle of the first control signal, and generate the first control signal according to the reduced duty cycle.

Specifically, after the elevator system controller 510 acquires the working current information of the holding brake, it analyzes the working current information to obtain the working current value of the holding brake 400, and compares the working current value with the preset current value, if If the operating current value is less than the preset current value, the duty ratio of the first control signal is increased, and the first control signal is generated according to the increased duty ratio, and the conduction time of the first switch module 310 is increased, thereby increasing the first voltage Transform the power-on time of the module 110, and then increase the working current of the brake 400 when it is working, so that it meets the preset current value; if the working current value is greater than the preset current value, reduce the duty cycle of the first control signal, and Generate the first control signal according to the reduced duty cycle, reduce the conduction time of the first switch module 310, further reduce the conduction time of the first voltage conversion module 110, and further reduce the working current of the holding brake 400 when it is working, so that It satisfies the preset current value.

In the embodiment of the present invention, the preset current value can be preset according to the required rated current value of the holding brake 400 . Optionally, in the embodiment of the present invention, the holding brake 400 is connected to the elevator system controller 510. After the elevator system is powered on, the elevator system controller 510 obtains the parameter information of the holding brake 400 (including the required rated current value), and set the rated current value as the preset current value. In this way, it can automatically adapt to all holding brakes with different rated operating currents on the market.

The control method of the elevator brake power supply provided by the embodiment of the present invention obtains the working current information of the brake through the current sampling module, and analyzes the working current information to obtain the working current value of the brake, and based on the working current value The relationship with the preset current value, adjust the duty cycle of the first control signal to adjust the conduction time of the first switch module, and then adjust the conduction time of the first voltage conversion module to adjust the output current of the first voltage conversion module (that is, the working current when the brake is working), so that it meets the preset current value. It can compensate the current deviation caused by the error of the brake power supply and the difference between the cold and hot states of the brake brake, and eliminate the current deviation of the existing brake power supply under high and low temperature conditions, which may cause the elevator system to drag the brake or report an error. The process is fully automated and intelligent without manual intervention. In addition, the elevator system controller can set a preset current value according to the parameter information of the brake, and can automatically adapt to all brakes with different rated operating currents on the market.

Optionally, as shown in FIG. 2 , the elevator brake power supply further includes a first closing switch module 601 and a second closing switch module 602 . The secondary coil is provided with a center tap. In this way, by adjusting the number of turns of the secondary coil and the position of the center tap, the first voltage conversion module 110 can output two different output voltages of 55V and 110V, so as to adapt to the two types of drivers on the market. Voltage holding brake. The first end of the secondary coil is connected to the power input end of the brake 400 , and the second end of the secondary coil is connected to the center tap and the ground terminal GND of the brake 400 .

The first combined switch module 601 is connected between the second end of the secondary coil and the ground terminal GND of the brake 400, and the second combined switch module 602 is connected between the center tap and the ground terminal GND of the brake 400 , the control terminal of the first combined switch module 601 and the control terminal of the second combined switch module 602 are respectively connected to the elevator system controller 510 .

Before step S100, obtaining the working current information of the holding brake through the current sampling module, it also includes:

Determine the adaptive voltage information of the holding brake;

Based on the adaptive voltage information, the first combining switch or at least one second combining switch is controlled to be turned on, so that the first voltage conversion module outputs a voltage adapted to the brake.

Fig. 4 is the flow chart of another kind of elevator brake power control method that the embodiment of the present invention provides, as shown in Fig. 4, this method comprises:

S080. Determine the adaptive voltage information of the brake.

After the elevator system is powered on, the elevator system controller 510 obtains the parameter information of the holding brake 400 (including the required driving voltage value, that is, the adaptive voltage information).

S090. Control the first combining switch or at least one second combining switch to be turned on based on the adaptive voltage information.

Specifically, the elevator system controller 510 controls the on-off of the first combined switch module 601 or the second combined switch module 602 according to the adaptive voltage information, so as to control the output voltage of the first voltage conversion module 110 . Exemplarily, when the adaptive voltage of the brake is 110V, the elevator system controller 510 controls the first closing switch module 601 to turn on, the second closing switch module 602 to turn off, and the output voltage of the first voltage conversion module 110 is 110V; when the adaptive voltage of the brake is 55V, the elevator system controller 510 controls the first closing switch module 601 to be disconnected, the second closing switch module 602 is turned on, and the output voltage of the first voltage conversion module 110 is 55V.

S100. Obtain the working current information of the holding brake through the current sampling module.

S210. Determine the working current value of the holding brake according to the working current information.

S220. Generate a first control signal according to the working current value, and output the first control signal to the first switch module.

The embodiment of the present invention also provides an elevator system, including the elevator brake power supply as provided in the above embodiments of the present invention.

In the description herein, it should be understood that the terms "first" and "second" are only used for distinction in description and have no special meaning.

In the description of this specification, a description referring to the terms "an embodiment", "an example" and the like means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention middle. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

The above describes the technical principles of the present invention in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present invention without creative work, and these modes will all fall within the protection scope of the present invention.

Claims (12)

1. a kind of elevator internal contracting brake power supply characterized by comprising

First voltage conversion module, the input terminal of the first voltage conversion module become for connecting alternating current, the first voltage The output end of mold changing block is connect with contracting brake；

Current sampling module, the input terminal of the current sampling module are connect with the output end of the first voltage conversion module, The output end of the current sampling module and the sample rate current input terminal of elevator system controller connect；

First switch module, the control terminal of the first switch module and the first control signal of the elevator system controller are defeated Outlet connection, for adjusting the output electric current of the first voltage conversion module according to first control signal.

2. elevator internal contracting brake power supply according to claim 1, which is characterized in that the secondary wire of the first voltage conversion module Circle is provided at least one centre cap, the power input company of the first end of the secondary coil and the contracting brake It connects, the second end of the secondary coil is connect with the centre cap with the ground terminal of the contracting brake.

3. elevator internal contracting brake power supply according to claim 2, which is characterized in that further include second voltage conversion module, second Switch module, energy-storage module, control chip；

The first end of the primary coil of the first voltage conversion module connects alternating current, the primary of the first voltage conversion module The second end of coil is connect with the first end of the first switch module；

The second end of the first switch module is connect with the first end of the second switch module, the second switch module Second end is connect with the first input end of the second voltage conversion module, the second input terminal of the second voltage conversion module It is connect with the first end of energy-storage module, the second end of the energy-storage module is connect with the second end of the first switch module；

The output end of the second voltage conversion module is connect with the power input of the elevator system controller.

4. elevator internal contracting brake power supply according to claim 3, which is characterized in that the ground terminal of the second voltage conversion module It is connect with the ground terminal of the contracting brake.

5. elevator internal contracting brake power supply according to claim 2, which is characterized in that further include the first combining switch module and at least One second combining switch module, it is described first combining switch module be connected to the secondary coil second end and the band-type brake Between the ground terminal of brake, the second combining switch module is connected to connecing for the centre cap and the contracting brake Between ground terminal, it is described first combining switch module control terminal and it is described second combining switch module control terminal respectively with it is described Elevator system controller connection.

6. elevator internal contracting brake power supply according to claim 5, which is characterized in that further include first sampling resistor and at least One the second sampling resistor, first sampling resistor be connected to the secondary coil second end and the contracting brake Between ground terminal, second sampling resistor is connected between the centre cap and the ground terminal of the contracting brake；

The current sampling module includes the first current sampling unit and at least one second current sampling unit；

First current sampling unit is in parallel with first sampling resistor, second current sampling unit and corresponding institute State the parallel connection of the second sampling resistor；

The sample rate current output end of first current sampling unit and second current sampling unit and elevator device control The sample rate current input terminal of device connects.

7. elevator internal contracting brake power supply according to claim 1, which is characterized in that further include electromagnetic interference filtering module and rectification Filter module, the input terminal of the electromagnetic interference filtering module connect alternating current, the output end of the electromagnetic interference filtering module with The input terminal of the rectification filtering module connects, the output end of the rectification filtering module and the first voltage conversion module Input terminal connection.

8. a kind of control method of elevator internal contracting brake power supply, which is characterized in that be based on elevator internal contracting brake as claimed in claim 1 to 7 Power supply, which comprises

By current sampling module, the operating current information of contracting brake is obtained；

First control signal is exported to first switch module based on the operating current information, to adjust first voltage conversion module Output electric current.

9. the control method of elevator internal contracting brake power supply according to claim 8, which is characterized in that described based on the work electricity Stream information exports first control signal to first switch module, comprising:

The working current value of the contracting brake is determined according to the operating current information；

First control signal is generated according to the working current value, and the first control signal is exported to the first switch Module.

10. the control method of elevator internal contracting brake power supply according to claim 9, which is characterized in that the working current value is used It is described that first control signal is generated according to the working current value in the duty ratio for determining the first control signal, comprising:

If the working current value be less than pre-set current value, improve the duty ratio of first control signal, and according to raising after Duty ratio generates the first control signal；

If the working current value is greater than current value, the duty ratio of first control signal is reduced, and according to the duty after reduction Than generating the first control signal.

11. the control method of elevator internal contracting brake power supply according to claim 8, which is characterized in that

The elevator internal contracting brake power supply further includes the first combining switch module and at least one second combining switch module；

Before the operating current information for obtaining contracting brake by the current sampling module, further includes:

Determine the adaptation information of voltage of the contracting brake；

Based on adaptation information of voltage control the first combining switch or at least one second combining switch conduction, so that the first electricity The voltage for pressing conversion module output to be adapted with the contracting brake.

12. a kind of elevator device, which is characterized in that including elevator internal contracting brake power supply as claimed in claim 1.