CN104917424A - Motor internal contracting brake control system of construction elevator - Google Patents
Motor internal contracting brake control system of construction elevator Download PDFInfo
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- CN104917424A CN104917424A CN201510275452.5A CN201510275452A CN104917424A CN 104917424 A CN104917424 A CN 104917424A CN 201510275452 A CN201510275452 A CN 201510275452A CN 104917424 A CN104917424 A CN 104917424A
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Abstract
The application provides a motor internal contracting brake control system of a construction elevator. When a voltage outputted by a power grid input terminal fluctuates, a voltage sampling signal fluctuates consequently; but a control unit obtains a conduction angle according to a preset internal contracting brake output voltage and the voltage sampling signal; a PWM control signal is generated and outputted based on the conduction angle; a controllable rectification drive circuit is controlled to generate and output a rectification drive signal according to the PWM control signal; the controllable rectification drive circuit carries out rectification on the voltage inputted by the power grid input terminal according to the rectification drive signal to reach the preset internal contracting brake output voltage and then the rectified voltage is outputted; and then the voltage outputted by the motor internal contracting brake power supply will not fluctuate with the voltage inputted by the power grid input terminal, thereby guaranteeing the safety internal contracting braking and brake releasing of the internal contracting brake motor of the construction elevator. Meanwhile, the control system does not need any industrial frequency transformer, thereby reducing the cost with comparison with the prior art.
Description
Technical field
The present invention relates to building hoist technical field, particularly relate to a kind of motor internal contracting brake control system of building hoist.
Background technology
In the running of building hoist, when occurring the situation of the main electric power down of frequency converter report fault, manual stoppage or input AC, described building hoist needs to shut down in time, and namely the band-type brake motor of described building hoist needs immediately by locking.And described band-type brake motor uses DC electromagnetic brake (i.e. band-type brake coil) to carry out band-type brake usually, the operation principle of described DC electromagnetic brake is: when described DC electromagnetic brake obtains certain voltage (such as the nominal DC 195V) that provided by motor internal contracting brake braking power, can declutch, described band-type brake motor normally runs; When described DC electromagnetic brake dead electricity, can realize band-type brake, described band-type brake motor is out of service.
Described motor internal contracting brake braking power of powering for described DC electromagnetic brake of the prior art, the specified line voltage of most employing 380V is depressurized to 220VAC by Industrial Frequency Transformer, then after full-wave rectification, provide steamed bun wave voltage 198VDC to described DC electromagnetic brake; If without the step-down of described Industrial Frequency Transformer, directly specified for 380V line voltage being carried out full-wave rectification will draw 342VDC, if through halfwave rectifier, export 171VDC, all not meet the rated voltage demand of described DC electromagnetic brake.So an Industrial Frequency Transformer must be there is in prior art, make the cost of scheme higher.
Described in this scheme, the band-type brake output voltage of motor internal contracting brake braking power can fluctuate with the fluctuation of line voltage simultaneously, if line voltage is too high, then described DC electromagnetic brake will generate heat seriously, and fragile described DC electromagnetic brake, affects the life-span of described DC electromagnetic brake; If line voltage is too low, then likely causes described DC electromagnetic brake not declutch completely, thus affect the normal operation of motor.
Summary of the invention
In view of this, the invention provides a kind of motor internal contracting brake control system of building hoist, to solve the problem of the higher and band-type brake output voltage of cost of the prior art with voltage ripple of power network.
To achieve these goals, the technical scheme that provides of the embodiment of the present invention is as follows:
A motor internal contracting brake control system for building hoist, comprising: control unit, is connected to the motor internal contracting brake braking power be connected between electrical network input and the band-type brake coil of band-type brake motor and with described control unit; Wherein:
Described motor internal contracting brake braking power comprises: the voltage sampling circuit be connected with described control unit, the voltage inputted by described electrical network input for sampling and the output voltage of phase place or described motor internal contracting brake braking power and phase place, generate and export described voltage sampling signal;
Described control unit for receiving described voltage sampling signal, and obtains the angle of flow according to default band-type brake output voltage and described voltage sampling signal, generates and export pwm control signal according to the described angle of flow;
Described motor internal contracting brake braking power also comprises:
The controlled rectification drive circuit be connected with described control unit, for receiving and according to described pwm control signal, generating and export rectification drive singal;
Controlled rectification circuit between the band-type brake coil being connected to described electrical network input and described band-type brake motor, the control end of described controlled rectification circuit is connected with the output of described controlled rectification drive circuit; Described controlled rectification circuit for receiving described rectification drive singal, and exports after the voltage commutation inputted by described electrical network input to described default band-type brake output voltage according to described rectification drive singal.
Preferably, the described angle of flow is silicon controlled ON time and conduction phase.
Preferably, described electrical network input is for connecting electrical network AC380V.
Preferably, described controlled rectification circuit is half-controlled rectifier circuit, the topological structure that described controlled rectification drive circuit adopts light-coupled isolation, transformer isolation or relay to isolate.
Preferably, described voltage sampling circuit is connected between described electrical network input and described control unit, and the voltage and phase place that are inputted by described electrical network input for sampling, generate and export described voltage sampling signal; Described control unit obtains according to described voltage sampling signal the formula that the angle of flow adopts:
Wherein, V
avfor described default band-type brake output voltage, V
peakfor the peak value of the voltage by described electrical network input input, π-x is the described angle of flow.
Preferably, described voltage sampling circuit is connected between the output of described controlled rectification circuit and described control unit, for output voltage and the phase place of described motor internal contracting brake braking power of sampling, generates and exports described voltage sampling signal; Described voltage sampling signal comprises magnitude of voltage and the phase place of the output voltage of described motor internal contracting brake braking power;
When described control unit performs and obtains the step of the angle of flow according to described voltage sampling signal, specifically for: according to the difference between the actual value of the described output voltage comprised in described voltage sampling signal and described default band-type brake output voltage, regulate the described angle of flow, until described difference is zero, obtain the described angle of flow.
Preferably, described motor internal contracting brake control system also comprises keyboard, and described keyboard is: LED keyboard, liquid crystal keyboard or LCD keyboard, for tuning parameter and display frequency conversion output frequency voltage and current band-type brake magnitude of voltage.
Preferably, the band-type brake coil freewheeling circuit be connected with the band-type brake coil of described band-type brake motor comprises:
The first resistance be connected in series and the first diode; Described first resistance is connected with the two ends of the band-type brake coil of described band-type brake motor respectively with the two ends of the series via of described first diode.
Preferably, described motor internal contracting brake braking power also comprises:
The first normal open switch between the band-type brake coil being connected to described controlled rectification circuit and described band-type brake motor;
Be connected to the first ON-OFF control circuit between the control end of described first normal open switch and described control unit.
Preferably, described motor internal contracting brake braking power also comprises:
Be connected to the second normal open switch between described electrical network input and described controlled rectification circuit;
Be connected to the second switch control circuit between the control end of described second normal open switch and described control unit.
The application provides a kind of motor internal contracting brake control system of building hoist, when the voltage fluctuation that electrical network input exports, voltage sampling signal can fluctuate thereupon, but control unit can obtain the angle of flow according to default band-type brake output voltage and described voltage sampling signal, generate according to the described angle of flow again and export pwm control signal, control controlled rectification drive circuit according to described pwm control signal, generate and export rectification drive singal, by controlled rectification circuit, the voltage inputted by described electrical network input is exported according to after described rectification drive singal rectification to described default band-type brake output voltage again, the voltage finally making described motor internal contracting brake braking power export can not be followed the voltage inputted by described electrical network input and be fluctuated, and then ensure that described building hoist band-type brake motor safe internal contracting and declutch.Meanwhile, the motor internal contracting brake control system of the described building hoist that the application provides without the need to Industrial Frequency Transformer, so reduce cost compared to existing technology.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The motor internal contracting brake Control system architecture schematic diagram of a kind of building hoist that Fig. 1 provides for the embodiment of the present application;
The part-structure schematic diagram of the motor internal contracting brake control system of a kind of building hoist that Fig. 2 provides for another embodiment of the application;
The part-structure schematic diagram of the motor internal contracting brake control system of another building hoist that Fig. 3 provides for another embodiment of the application;
The motor internal contracting brake Control system architecture schematic diagram of another building hoist that Fig. 4 provides for another embodiment of the application;
The motor internal contracting brake Control system architecture schematic diagram of another building hoist that Fig. 5 provides for another embodiment of the application;
The motor internal contracting brake Control system architecture schematic diagram of another building hoist that Fig. 6 provides for another embodiment of the application;
The motor internal contracting brake Control system architecture schematic diagram of another building hoist that Fig. 7 provides for another embodiment of the application;
The part-structure schematic diagram of the motor internal contracting brake control system of another building hoist that Fig. 8 provides for another embodiment of the application;
The signal waveforms of the motor internal contracting brake control system of a kind of building hoist that Fig. 9 provides for another embodiment of the application;
The signal waveforms of the motor internal contracting brake control system of another building hoist that Figure 10 provides for another embodiment of the application;
The motor internal contracting brake Control system architecture schematic diagram of another building hoist that Figure 11 provides for another embodiment of the application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides a kind of motor internal contracting brake control system of building hoist, to solve the problem of the higher and band-type brake output voltage of cost of the prior art with voltage ripple of power network.
Concrete, the motor internal contracting brake control system of described building hoist, as shown in Figure 1, comprising:
Control unit 201;
Be connected to the motor internal contracting brake braking power 202 be connected between electrical network input and the band-type brake coil of band-type brake motor and with control unit 201;
Wherein, motor internal contracting brake braking power 202 comprises:
The voltage sampling circuit 221 be connected with control unit 201;
The controlled rectification drive circuit 222 be connected with control unit 201;
Controlled rectification circuit 223 between the band-type brake coil being connected in series in described input power and described band-type brake motor.
Concrete operation principle is:
The input voltage of voltage sampling circuit 221 sample motor brake sticking brake power supply 202 and phase place or output voltage and phase place, generate and output voltage sampled signal.
Control unit 201 receives described voltage sampling signal, and obtains the angle of flow according to default band-type brake output voltage and described voltage sampling signal, generates and export pwm control signal according to the described angle of flow; Preferably, the described angle of flow is silicon controlled ON time and conduction phase;
Controlled rectification drive circuit 222 receives and according to described pwm control signal, generates and export rectification drive singal.
Controlled rectification circuit 223 receives the voltage and described rectification drive singal that are inputted by described electrical network input, and exports after the voltage commutation inputted by described electrical network input to described default band-type brake output voltage according to described rectification drive singal.
The motor internal contracting brake control system of the described building hoist that the present embodiment provides, realize the band-type brake of the band-type brake motor of building hoist is controlled by said process, when the voltage fluctuation that electrical network input exports, described voltage sampling signal can fluctuate thereupon, but control unit 201 can obtain the described angle of flow according to described default band-type brake output voltage and described voltage sampling signal, generate according to the described angle of flow again and export described pwm control signal, control controlled rectification drive circuit 222 according to described pwm control signal, generate and export described rectification drive singal, by controlled rectification circuit 223, the voltage inputted by described electrical network input is exported according to after described rectification drive singal rectification to described default band-type brake output voltage again, the voltage finally making described motor internal contracting brake braking power export can not be followed the voltage inputted by described electrical network input and be fluctuated, and then ensure that described building hoist band-type brake motor safe internal contracting and declutch.Meanwhile, the motor internal contracting brake control system of the described building hoist that the application provides without the need to Industrial Frequency Transformer, so reduce cost compared to existing technology.
Preferably, described electrical network input is for connecting electrical network AC380V; In concrete practical application, two live wires that can get access to grid.
What deserves to be explained is, in concrete practical application, the motor internal contracting brake control system of described building hoist as shown in Figure 1, comprise: control unit 201 and motor internal contracting brake braking power 202, and master controller of the prior art 203, described building hoist frequency converter in keyboard 204 and driver element 205, the band-type brake coil freewheeling circuit 206 that is connected with the band-type brake coil of described band-type brake motor.
Control unit 201 can be the control unit in the frequency converter of described building hoist, also can be the newly-increased control unit be connected with the original control unit in the frequency converter of described building hoist, be not specifically limited herein.
In concrete practical application, control unit 201 performs receiver voltage sampled signal, and obtains the angle of flow according to default band-type brake output voltage and described voltage sampling signal, when generating according to the described angle of flow and export pwm control signal step, specifically for:
Receive and according to described voltage sampling signal, obtain magnitude of voltage and the phase place of described voltage sampling signal respectively;
According to described default band-type brake output voltage, described magnitude of voltage and described phase place, obtain the angle of flow;
According to the described angle of flow, calculate angle of flow PWM;
Generate according to described angle of flow PWM and export described pwm control signal.
Now, as shown in Figure 2, control unit 201 comprises:
Analog quantity acquiring unit 211, phase place acquiring unit 212;
The angle of flow PWM computing unit 213 be connected with phase place acquiring unit 212 with analog quantity acquiring unit 211;
The PWM output unit 214 be connected with angle of flow PWM computing unit 213.
Analog quantity acquiring unit 211 is for receiving and according to described voltage sampling signal, obtaining described magnitude of voltage.
Phase place acquiring unit 212 is for receiving and according to described voltage sampling signal, obtaining described phase place.
Angle of flow PWM computing unit 213 for receiving described magnitude of voltage and described voltage-phase, and equals the mode of average voltage level after utilizing the SIN function of the angle of flow to carry out integration, calculates the angle of flow; , calculate angle of flow PWM.
PWM output unit 214 is for receiving and generating according to described angle of flow PWM and export described pwm control signal.
When described keyboard also comprises display screen, control unit 201 can also comprise display unit.
Master controller 203 and keyboard 204 are for generating according to user operation and exporting described operational order.In concrete application, master controller 203 is connected with a joystick, and user operates described joystick, realizes the given of the start and stop gearshift order run for described building hoist.
Control unit 201 receives and the operational order exported according to master controller 203 and keyboard 204, generates and exports drive control signal and other control signals.Wherein, described drive control signal is used for exporting driver element 205 to, makes driver element 205 according to described drive control signal, and the band-type brake motor controlling described building hoist runs.
Preferably, keyboard 204 is: LED keyboard, liquid crystal keyboard or LCD keyboard, for tuning parameter and display frequency conversion output frequency voltage and current band-type brake magnitude of voltage.In concrete application, keyboard 204 can be determined specifically for environment according to it, is not specifically limited herein.
Band-type brake coil freewheeling circuit 206 is for the needs that declutch according to band-type brake, and the voltage on the band-type brake coil within band-type brake the moment in time described motor of release, ensures that described motor realizes declutching timely.
Preferably, as shown in Figure 3, band-type brake coil freewheeling circuit 206 comprises:
The the first resistance R1 be connected in series and the first diode D1; First resistance R1 is connected with the two ends of the band-type brake coil 261 of described band-type brake motor respectively with the two ends of the series via of the first diode D1.
When motor internal contracting brake braking power 202 no-output voltage, band-type brake coil 261 is by the first diode D1 and the first resistance R1 afterflow.In Fig. 2, the position of the first diode D1 and the first resistance R1 is also interchangeable.
Master controller 203 in the present embodiment, keyboard 204, driver element 205 and band-type brake coil freewheeling circuit 206, all belong to prior art, repeat no more herein.
Preferably, described controlled rectification circuit is half-controlled rectifier circuit, the topological structure that described controlled rectification drive circuit adopts light-coupled isolation, transformer isolation or relay to isolate.
In concrete practical application, the topological structure that described controlled rectification drive circuit can adopt light-coupled isolation, transformer isolation or relay to isolate, is not specifically limited herein, can depending on its embody rule environment.
Preferably, as shown in Figure 4, voltage sampling circuit 221 is connected between described electrical network input and control unit 201, and the voltage and phase place that are inputted by described electrical network input for sampling, generate and export described voltage sampling signal; Described voltage sampling signal comprises magnitude of voltage and the phase place of the input voltage of motor internal contracting brake braking power 202;
Control unit 201 obtains according to described voltage sampling signal the formula that the angle of flow adopts:
Wherein, V
avfor described default band-type brake output voltage, V
peakfor the peak value of the voltage by described electrical network input input, π-x is the described angle of flow.
According to above-mentioned formula, through can be calculated:
Then described in silicon controlled, the radian of the angle of flow is calculated as follows:
In concrete application, described default band-type brake output voltage is determined by the characteristic of band-type brake coil, for the band-type brake motor of described building hoist, is generally 195VDC.
Or as shown in Figure 5, voltage sampling circuit 221 is connected between the output of controlled rectification circuit 223 and control unit 201, for output voltage and the phase place of sample motor brake sticking brake power supply 202, generates and export described voltage sampling signal; Described voltage sampling signal comprises magnitude of voltage and the phase place of the output voltage of motor internal contracting brake braking power 202;
When control unit 201 performs and obtains the step of the angle of flow according to described voltage sampling signal, specifically for: according to the difference between the actual value of the described output voltage comprised in described voltage sampling signal and described default band-type brake output voltage, regulate the described angle of flow, until described difference is zero, obtain the described angle of flow.
Preferably, as shown in Figure 6, motor internal contracting brake braking power 202 also comprises:
The first normal open switch 224 between the band-type brake coil being connected to controlled rectification circuit 223 and described band-type brake motor;
Be connected to the first ON-OFF control circuit 225 between the control end of the first normal open switch 224 and control unit 201.
Preferably, as shown in Figure 7, motor internal contracting brake braking power 202 also comprises:
Be connected to the second normal open switch 226 between described electrical network input and controlled rectification circuit 223;
Be connected to the second switch control circuit 227 between the control end of the second normal open switch 226 and control unit 201.
In concrete practical application, normal open switch 224 can be contactor or relay, is not specifically limited herein.
Fig. 6 and Fig. 7 is all connected between control unit 201 and described electrical network input for voltage sampling circuit 221 and shows, in concrete practical application, voltage sampling circuit 221 also can be connected between the output of control unit 201 and controlled rectification circuit 223, is not specifically limited herein.
Concrete operation principle is:
The conducting of signal controlling first normal open switch 224 that the first ON-OFF control circuit 225 exports according to control unit 201 or shutoff.The conducting of signal controlling second normal open switch 226 that second switch control circuit 227 exports according to control unit 201 or shutoff.In concrete application, the first ON-OFF control circuit 225 and second switch control circuit 227 all belong to prior art, also can be used for realizing the electic protection for the motor internal contracting brake control system of described building hoist.
Controlled rectification circuit 223 can be made to receive by the voltage of described electrical network input input when the first normal open switch 224 and the equal conducting of the second normal open switch 226.Concrete, the first normal open switch 224 and the second normal open switch 226 all conducting time, motor internal contracting brake braking power 202 provides band-type brake power supply to the band-type brake coil of described band-type brake motor, and motor declutches, and now motor can run; When first normal open switch 224 and the second normal open switch 226 all turn off, motor internal contracting brake braking power 202 does not provide band-type brake power supply to the band-type brake coil of described band-type brake motor, and band-type brake motor internal contracting brake is out of service.
In concrete practical application, as shown in Figure 8, controlled rectification circuit 223 comprises:
The the first diode D1 be connected in series and the second diode D2, tie point is connected with one end of described electrical network input;
The 3rd diode D3 and the controllable silicon SCR be connected in series, tie point is connected with the other end of described electrical network input;
The cathode connection of two series via is the cathode output end of controlled rectification circuit 223, the anode tie point of described two series via is the cathode output end of controlled rectification circuit 223, and the control end of controllable silicon SCR is connected with the output of controlled rectification drive circuit 222.
Concrete operation principle is:
The voltage V inputted by described electrical network input
l11-L12, the output voltage Vdc of controlled rectification circuit 223 and described conduction angle control signal BRK_PWM oscillogram as shown in Figure 9: the voltage V inputted by described electrical network input
l11-L12during positive half cycle, output voltage Vdc determines (the SIN function rms voltage containing the angle of flow carry out integration equal mean voltage can calculate the angle of flow) by thyristor operating angle, when described conduction angle control signal BRK_PWM is high level, first diode D1 and controllable silicon SCR conducting, the voltage V inputted by described electrical network input
l11-L12when positive half cycle and the non-conducting of controllable silicon SCR, the band-type brake coil of described band-type brake motor is by the second diode D2 and the first diode D1 afterflow; The voltage V inputted by described electrical network input
l11-L12during negative half period, the second diode D2 and the 3rd diode D3 conducting.In the controlled rectification circuit that the first diode D1 shown in Fig. 8, the second diode D2, the 3rd diode D3, controllable silicon SCR are formed, controllable silicon SCR also can be placed on the optional position of the first diode D1, the second diode D2, the 3rd diode D3; In fig .9, the voltage V inputted by described electrical network input
l11-L12during the negative half period in each cycle, controllable silicon SCR is the angle of flow once, controllable silicon SCR also can at one of them negative half period once angle of flow in every two cycles, and waveform refers to Figure 10 (the SIN function rms voltage containing the angle of flow carry out integration equal mean voltage can calculate the angle of flow); Controllable silicon SCR also at one of them negative half period once angle of flow in every three, four or five cycles, can be not specifically limited herein.
Two normal open switch 224 can play double protection, and when one of them normal open switch 224 sticks together, all right action of another normal open switch 224, ensures that normal open switch 224 can realize its function.
In concrete practical application, as shown in figure 11, control unit 201 is the newly-increased control unit be connected with the original control unit 200 in the frequency converter of described building hoist.
Wherein, original control unit 200 is for receiving and according to described operational order, generating and export described drive control signal and other signals; Control unit 201 is for receiving and according to voltage sampling signal, generating and export pwm control signal.
In addition, the motor internal contracting brake control system of described building hoist as shown in Figure 3, comprising:
Control unit 201, motor internal contracting brake braking power 202, master controller 203, keyboard 204, driver element 205 and band-type brake coil freewheeling circuit 206.
Motor internal contracting brake braking power 202 also can adopt way of realization as shown in Figure 6, comprising:
Voltage sampling circuit 221, controlled rectification drive circuit 222, controlled rectification circuit 223, normal open switch 224 and ON-OFF control circuit 225.
Original control unit 200 now in the present embodiment is connected with contactor drive circuit 222 with keyboard 204, master controller 203, driver element 205 respectively; Control unit 201 is connected with controlled rectification drive circuit 223 with voltage sampling circuit 221 respectively.
Preferably, original control unit 200 also for the voltage sampling signal that reception control unit 201 forwards, and exports described keyboard to.Now, original control unit 200 is also connected with control unit 201, between the two mutually can communication, now described keyboard can comprise display screen, and the band-type brake output voltage that described display screen is gathered by original control unit 200 reception control unit 201 also shows.
Preferably, control unit 201 also for: generate and output display signal to described keyboard.
Now, control unit 201 also comprises display unit.Described display comprises: frequency conversion output frequency voltage, tuning parameter and current band-type brake magnitude of voltage.Described current band-type brake magnitude of voltage can think described band-type brake output voltage.
In the present invention, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Below be only the preferred embodiment of the present invention, those skilled in the art understood or realizes the present invention.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a motor internal contracting brake control system for building hoist, is characterized in that, comprising: control unit, is connected to the motor internal contracting brake braking power be connected between electrical network input and the band-type brake coil of band-type brake motor and with described control unit; Wherein:
Described motor internal contracting brake braking power comprises: the voltage sampling circuit be connected with described control unit, the voltage inputted by described electrical network input for sampling and the output voltage of phase place or described motor internal contracting brake braking power and phase place, generate and export described voltage sampling signal;
Described control unit for receiving described voltage sampling signal, and obtains the angle of flow according to default band-type brake output voltage and described voltage sampling signal, generates and export pwm control signal according to the described angle of flow;
Described motor internal contracting brake braking power also comprises:
The controlled rectification drive circuit be connected with described control unit, for receiving and according to described pwm control signal, generating and export rectification drive singal;
Controlled rectification circuit between the band-type brake coil being connected to described electrical network input and described band-type brake motor, the control end of described controlled rectification circuit is connected with the output of described controlled rectification drive circuit; Described controlled rectification circuit for receiving described rectification drive singal, and exports after the voltage commutation inputted by described electrical network input to described default band-type brake output voltage according to described rectification drive singal.
2. the motor internal contracting brake control system of building hoist according to claim 1, is characterized in that, the described angle of flow is silicon controlled ON time and conduction phase.
3. the motor internal contracting brake control system of building hoist according to claim 1, is characterized in that, described electrical network input is for connecting electrical network AC380V.
4. the motor internal contracting brake control system of building hoist according to claim 1, it is characterized in that, described controlled rectification circuit is half-controlled rectifier circuit, the topological structure that described controlled rectification drive circuit adopts light-coupled isolation, transformer isolation or relay to isolate.
5. the motor internal contracting brake control system of building hoist according to claim 1, it is characterized in that, described voltage sampling circuit is connected between described electrical network input and described control unit, the voltage and phase place that are inputted by described electrical network input for sampling, generate and export described voltage sampling signal; Described control unit obtains according to described voltage sampling signal the formula that the angle of flow adopts:
Wherein, V
avfor described default band-type brake output voltage, V
peakfor the peak value of the voltage by described electrical network input input, π-x is the described angle of flow.
6. the motor internal contracting brake control system of building hoist according to claim 1, it is characterized in that, described voltage sampling circuit is connected between the output of described controlled rectification circuit and described control unit, for output voltage and the phase place of described motor internal contracting brake braking power of sampling, generate and export described voltage sampling signal; Described voltage sampling signal comprises magnitude of voltage and the phase place of the output voltage of described motor internal contracting brake braking power;
When described control unit performs and obtains the step of the angle of flow according to described voltage sampling signal, specifically for: according to the difference between the actual value of the described output voltage comprised in described voltage sampling signal and described default band-type brake output voltage, regulate the described angle of flow, until described difference is zero, obtain the described angle of flow.
7. according to the motor internal contracting brake control system of the arbitrary described building hoist of claim 1 to 6, it is characterized in that, described motor internal contracting brake control system also comprises keyboard, described keyboard is: LED keyboard, liquid crystal keyboard or LCD keyboard, for tuning parameter and display frequency conversion output frequency voltage and current band-type brake magnitude of voltage.
8., according to the motor internal contracting brake control system of the arbitrary described building hoist of claim 1 to 6, it is characterized in that, the band-type brake coil freewheeling circuit be connected with the band-type brake coil of described band-type brake motor comprises:
The first resistance be connected in series and the first diode; Described first resistance is connected with the two ends of the band-type brake coil of described band-type brake motor respectively with the two ends of the series via of described first diode.
9., according to the motor internal contracting brake control system of the arbitrary described building hoist of claim 1 to 6, it is characterized in that, described motor internal contracting brake braking power also comprises:
The first normal open switch between the band-type brake coil being connected to described controlled rectification circuit and described band-type brake motor;
Be connected to the first ON-OFF control circuit between the control end of described first normal open switch and described control unit.
10. the motor internal contracting brake control system of building hoist according to claim 9, is characterized in that, described motor internal contracting brake braking power also comprises:
Be connected to the second normal open switch between described electrical network input and described controlled rectification circuit;
Be connected to the second switch control circuit between the control end of described second normal open switch and described control unit.
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| CN201510275452.5A CN104917424B (en) | 2015-05-26 | 2015-05-26 | A kind of motor internal contracting brake control system of building hoist |
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| CN201510275452.5A CN104917424B (en) | 2015-05-26 | 2015-05-26 | A kind of motor internal contracting brake control system of building hoist |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106379830A (en) * | 2016-09-18 | 2017-02-08 | 广州广日电气设备有限公司 | Elevator contracting brake control device |
| CN108115709A (en) * | 2016-11-26 | 2018-06-05 | 沈阳新松机器人自动化股份有限公司 | Control box and solution band-type brake security system |
| CN108858206A (en) * | 2018-09-04 | 2018-11-23 | 珠海格力智能装备有限公司 | Band-type brake control device and system of robot and band-type brake control method of robot |
| CN109167339A (en) * | 2018-09-25 | 2019-01-08 | 北京卓立汉光仪器有限公司 | Automatic power loss contracting brake controller, equipment and control method |
| CN110880904A (en) * | 2019-10-16 | 2020-03-13 | 珠海格力电器股份有限公司 | Servo motor and method for automatically eliminating back electromotive force of band-type brake |
| WO2021127805A1 (en) * | 2019-12-23 | 2021-07-01 | 深圳市英威腾电气股份有限公司 | Functional safety device for frequency converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106379830A (en) * | 2016-09-18 | 2017-02-08 | 广州广日电气设备有限公司 | Elevator contracting brake control device |
| CN108115709A (en) * | 2016-11-26 | 2018-06-05 | 沈阳新松机器人自动化股份有限公司 | Control box and solution band-type brake security system |
| CN108858206A (en) * | 2018-09-04 | 2018-11-23 | 珠海格力智能装备有限公司 | Band-type brake control device and system of robot and band-type brake control method of robot |
| CN109167339A (en) * | 2018-09-25 | 2019-01-08 | 北京卓立汉光仪器有限公司 | Automatic power loss contracting brake controller, equipment and control method |
| CN110880904A (en) * | 2019-10-16 | 2020-03-13 | 珠海格力电器股份有限公司 | Servo motor and method for automatically eliminating back electromotive force of band-type brake |
| WO2021127805A1 (en) * | 2019-12-23 | 2021-07-01 | 深圳市英威腾电气股份有限公司 | Functional safety device for frequency converter |
| CN114467062A (en) * | 2019-12-23 | 2022-05-10 | 深圳市英威腾电气股份有限公司 | Functional safety device of frequency converter |
| CN114467062B (en) * | 2019-12-23 | 2024-09-10 | 深圳市英威腾电气股份有限公司 | Functional safety device of frequency converter |
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