CN208874270U - A kind of band-type brake motor control assembly - Google Patents
A kind of band-type brake motor control assembly Download PDFInfo
- Publication number
- CN208874270U CN208874270U CN201821762915.6U CN201821762915U CN208874270U CN 208874270 U CN208874270 U CN 208874270U CN 201821762915 U CN201821762915 U CN 201821762915U CN 208874270 U CN208874270 U CN 208874270U
- Authority
- CN
- China
- Prior art keywords
- band
- type brake
- connect
- rectifier
- detection circuit
- 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.)
- Active
Links
Landscapes
- Stopping Of Electric Motors (AREA)
Abstract
A kind of band-type brake motor control assembly that the utility model embodiment proposes, pass through the combination replacement contactor of relay and semiconductor switch, it realizes and the on-off between band-type brake coil and power supply is controlled, it avoids using big by electric network influencing caused by contactor, volume is big, complex circuit, the problems such as production and maintenance cost are high, pass through the electrical isolation being arranged between the first relay and the second relay realization power supply and rectifier between power supply and the input terminal of rectifier, rapidly switching off to the power supply of input band-type brake coil is realized by the way that semiconductor switch is arranged between rectifier and band-type brake coil, prevent band-type brake coil from causing band-type brake motor that cannot brake in time because of the afterflow process of diode in rectifier, cause car slipping phenomenon, simultaneously because of semiconductor switch fast response time, the first relay and the second relay can be made to realize non-loaded switching , improve the first relay and the second relay service life.
Description
Technical field
The utility model embodiment is related to motor control technology field, and in particular to a kind of band-type brake motor control assembly.
Background technique
As construction industry in China's continues to develop, band-type brake motor is widely applied, and has obtained good market
Degree of recognition.
The power control part of traditional band-type brake motor is controlled using low voltage equipments such as contactors, so that product
Volume is big, complex circuit, and production and maintenance cost are very high, while the control loop of low-voltage electrical apparatus composition is too big by electric network influencing,
Often there is low-voltage electrical apparatus coil damage phenomenon.
Utility model content
In order to solve the power control part of above-mentioned band-type brake motor, by electric network influencing is big etc., technical problems, the utility model are real
It applies example and provides a kind of band-type brake motor control assembly.
In view of this, the utility model embodiment provides a kind of band-type brake motor control assembly, it is applied to band-type brake motor, it is described
The band-type brake coil of band-type brake motor is connected to power supply by rectifier and control device；
The control device includes: switch controller and switching circuit；
The switch controller is connect with the switching circuit, and is sent to the switching circuit and controlled the switching circuit
The control signal of on or off；
The switching circuit includes: the first relay, the second relay and semiconductor switch；
First relay one end is connect with the first end of the power supply, the first input of the other end and the rectifier
End connection；
Second relay one end is connect with the second end of the power supply, the second input of the other end and the rectifier
End connection；
Described semiconductor switch one end is connect with the cathode output end of the rectifier, the other end and the band-type brake coil
First end connection, or, one end is connect with the cathode output end of the rectifier, the other end is connect with the second end of band-type brake coil.
Optionally, the control device further include: the cathode output end and the band-type brake coil of the rectifier are set
First end between, detect the current detection circuit of the output current value of the rectifier；
The current detection circuit is connect with the switch controller, and the current value that will test is sent to the switch control
Device processed.
Optionally, the switch controller includes:
It is connect with the current detection circuit, the current value that the current detection circuit is detected and preset current threshold
The current comparator that value is compared；
It is connect with the current comparator, receives the comparison result of current comparator, and the signal for generating control signal is raw
It grows up to be a useful person；
It is connect with the signal generator and the switching circuit, the control signal is sent to the switching circuit
Sender unit.
Optionally, the control device further include:
The rectifier voltage detection circuit being connect respectively with the cathode output end of the rectifier and cathode output end；
The band-type brake coil voltage detection circuit being connect respectively with the first end and second end of the band-type brake coil；
The rectifier voltage detection circuit and band-type brake coil voltage detection circuit are connect with the switch controller.
Optionally, the switch controller includes:
The voltage value for being connect with the rectifier voltage detection circuit, and the rectifier voltage detection circuit being detected
The first voltage comparator being compared with preset first voltage threshold value；
The electricity for being connect with the band-type brake coil voltage detection circuit, and the band-type brake coil voltage detection circuit being detected
The second voltage comparator that pressure value is compared with preset second voltage threshold value；
Connect respectively with the first voltage comparator and second voltage comparator, receive the first voltage comparator and
The comparison result of second voltage comparator, and generate the signal generator of control signal；
It is connect with the signal generator and the switching circuit, the control signal is sent to the switching circuit
Sender unit.
Optionally, the control device further include: one end is connect with the first end of the band-type brake coil, the other end with it is described
The absorbing circuit of the second end connection of band-type brake coil.
Optionally, the absorbing circuit is varistor.
Compared with prior art, the utility model embodiment propose a kind of band-type brake motor control assembly, by relay with
The combination replacement contactor of semiconductor switch is realized and is controlled the on-off between band-type brake coil and power supply, is avoided using contact
The problems such as big by electric network influencing caused by device, volume is big, complex circuit, high production and maintenance cost, by power supply and rectification
Electrical isolation between first relay and the second relay realization power supply and rectifier is set between the input terminal of device, by whole
Setting semiconductor switch realizes rapidly switching off to the power supply of input band-type brake coil between stream device and band-type brake coil, prevents band-type brake line
Circle causes band-type brake motor that cannot brake in time because of the afterflow process of diode in rectifier, causes car slipping phenomenon, while because
Semiconductor switch fast response time can make the first relay and the second relay realize non-loaded switching, improve the first relay
Device and the second relay service life.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, embodiment or the prior art will be retouched below
Attached drawing needed in stating is briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without any creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of band-type brake motor control assembly schematic diagram that the utility model embodiment one provides；
Fig. 2 is a kind of band-type brake motor control assembly schematic diagram that the utility model embodiment two provides；
Fig. 3 is a kind of band-type brake motor control assembly schematic diagram that the utility model embodiment three provides；
Fig. 4 is a kind of band-type brake motor control assembly schematic diagram that the utility model embodiment four provides.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
Embodiment one
Fig. 1 provides a kind of schematic diagram of band-type brake motor control assembly for the utility model embodiment, and the control device is answered
For band-type brake motor, the band-type brake coil of the band-type brake motor is connect by rectifier with AC power source (such as AC network), whole
The first end of the first input end and power supply that flow device connects, and the second input terminal of rectifier and the second end of power supply connect, rectification
The cathode output end of device is connect with the first end of band-type brake coil, and the second end of the cathode output end of rectifier and the coil connects
It connects；In order to control the turn-on and turn-off between power supply and band-type brake coil, the application provides a kind of control device, the control device packet
It includes: switch controller and switching circuit；
The switching circuit includes the first relay REL1, the second relay REL2 and semiconductor switch Q1；
As shown in Figure 1, the switch controller is connect with the switching circuit, and control letter is sent to the switching circuit
Number, the control signal controls the on or off of the switching circuit；
The first input end of the connection of the first end of described one end first relay REL1 and power supply, the other end and rectifier connects
It connects；
Second input terminal of the connection of the second end of described one end second relay REL2 and power supply, the other end and rectifier connects
It connects；
One end of the semiconductor switch Q1 is connect with the cathode output end of the rectifier, the other end and band-type brake coil
Second end connection.
Specifically, in the embodiment of the present application, the first relay REL1 and the second relay REL2 are dynamic circuit connector type (normally opened)
(H-type) solid-state relay.
In the specific implementation process, the semiconductor switch Q1 also can be set the rectifier anode with it is described
Between the first end of band-type brake coil, i.e., one end of the described semiconductor switch Q1 is connect with the cathode output end of the rectifier, separately
One end is connect with the first end of band-type brake coil, and such connection type is not shown.
Specifically, in the embodiment of the present application, the semiconductor switch Q1 may include P-channel metal-oxide-semiconductor field effect transistor and post
Raw diode.
Specifically, the semiconductor switch Q1 can also be IGBT (insulated gate bipolar transistor).
Specifically, by taking P-channel metal-oxide-semiconductor field effect transistor and parasitic diode as an example, when the semiconductor switch Q1 one end with
The cathode output end of the rectifier connects, taking the example shown in figure 1, described when the other end is connect with the second end of band-type brake coil
The source electrode of metal-oxide-semiconductor field effect transistor is connect with the cathode output end of the rectifier, the drain electrode of the metal-oxide-semiconductor field effect transistor and band-type brake coil
Second end connection, the grid of the metal-oxide-semiconductor field effect transistor connect with the switch controller；The anode of the parasitic diode with
The source electrode of the metal-oxide-semiconductor field effect transistor connects, and the cathode of the parasitic diode is connect with the drain electrode of the metal-oxide-semiconductor field effect transistor.
Specifically, when one end of the semiconductor switch Q1 is connect with the cathode output end of the rectifier, the other end and
When the first end connection of band-type brake coil, the drain electrode of the metal-oxide-semiconductor field effect transistor is connect with the cathode output end of the rectifier, described
The source electrode of metal-oxide-semiconductor field effect transistor is connect with the first end of band-type brake coil, the grid of the metal-oxide-semiconductor field effect transistor and the switch controller
Connection；The anode of the parasitic diode is connect with the source electrode of the metal-oxide-semiconductor field effect transistor, the cathode of the parasitic diode and institute
State the drain electrode connection of metal-oxide-semiconductor field effect transistor.
A kind of band-type brake motor control assembly that the utility model embodiment proposes, passes through the group of relay and semiconductor switch
Substitution contactor is closed, realizes and the on-off between band-type brake coil and power supply is controlled, avoid caused by using contactor by power grid
Influence the problems such as big, volume is big, complex circuit, high production and maintenance cost；As relay REL1, REL2 and semiconductor switch Q1
Control signal it is effective when, power supply pass through rectifier rectification after provide band-type brake motor brake needed for power supply (VO+/VO-).
By be arranged between power supply and the input terminal of rectifier the first relay and the second relay realize power supply with it is whole
The electrical isolation between device is flowed, is realized by the way that semiconductor switch is arranged between rectifier and band-type brake coil to input band-type brake coil
Power supply rapidly switches off, and prevents band-type brake coil because the afterflow process of diode in rectifier causes car slipping phenomenon, while because
Semiconductor switch fast response time can make the first relay and the second relay realize non-loaded switching, improve the first relay
Device and the second relay service life.
Embodiment two
Fig. 2 provides a kind of schematic diagram of band-type brake motor control assembly, as described in Figure 2, this reality for the utility model embodiment
The band-type brake motor control assembly for applying example offer includes: switch controller, switching circuit and current detection circuit；
The switching circuit is as described in embodiment one, and details are not described herein again.
The current detection circuit be arranged in the rectifier cathode output end and the band-type brake coil first end it
Between；
The current detection circuit is connect with the switch controller, the current value that the current detection circuit will test
It is sent to the switch controller.
The switch controller includes:
It is connect with the current detection circuit, the current value that the current detection circuit is detected and preset current threshold
The current comparator that value is compared；
It is connect with the current comparator, receives the comparison result of current comparator, and the signal for generating control signal is raw
It grows up to be a useful person；
It is connect with the signal generator and the switching circuit, the control signal is sent to the switching circuit
Sender unit.
Specifically, in the embodiment of the present application, when the current value exceeds current threshold, signal generator generates control
The control signal of REL1, REL2 and Q1 shutdown；The control signal for controlling REL1, REL2 and Q1 shutdown is sent to by sender unit
REL1, REL2 and Q1 realize to REL1, REL2 and Q1 block that rapidly shutdown exports.
Specifically, in the embodiment of the present application, the current detection circuit can for current sensor, current transformer,
Rogowski coil or Hall effect element etc..
Band-type brake motor control assembly provided by the embodiments of the present application is realized defeated to rectifier by setting current detection circuit
Electric current or load current are detected out, and the current value that will test is sent to switch controller, when the current value detected
Rapidly to relay REL1/REL2, half when abnormal (such as electric current is unsatisfactory for control logic signal beyond preset threshold, current signal)
Conductor switch Q1 realizes that the overload or short-circuit protection of control device is realized in block, shutdown output.
Embodiment three
Fig. 3 provides a kind of schematic diagram of band-type brake motor control assembly for the utility model embodiment, as shown in figure 3, this reality
A kind of band-type brake motor control assembly for applying example offer includes: switch controller, switching circuit, rectifier voltage detection circuit and embraces
Brake cable circle voltage detecting circuit；
The switching circuit is as described in embodiment one, and details are not described herein again.
Rectifier voltage detection circuit is connect with the cathode output end of the rectifier and cathode output end respectively；
Band-type brake coil voltage detection circuit is connect with the first end and second end of the band-type brake coil respectively；
Rectifier voltage detection circuit and band-type brake coil voltage detection circuit are connect with the switch controller.
The switch controller includes:
Connect with the rectifier voltage detection circuit, the voltage value that the rectifier voltage detection circuit is detected with
The first voltage comparator that preset first voltage threshold value is compared；
It is connect with the band-type brake coil voltage detection circuit, the voltage that the band-type brake coil voltage detection circuit is detected
The second voltage comparator that value is compared with preset second voltage threshold value；
Connect respectively with the first voltage comparator and second voltage comparator, receive the first voltage comparator and
The comparison result of second voltage comparator, and generate the signal generator of control signal；
It is connect with the signal generator and the switching circuit, the control signal is sent to the switching circuit
Sender unit.
Specifically, in the embodiment of the present application, when the voltage value that the rectifier voltage detection circuit detects is lower than the
When the voltage value that one voltage threshold and/or the band-type brake coil voltage detection circuit detect is lower than second voltage threshold value, signal
Generator generates the control signal of control REL1, REL2 and Q1 shutdown；Sender unit will control REL1, REL2 and Q1 shutdown
Control signal is sent to REL1, REL2 and Q1, realizes block to REL1, REL2 and Q1 rapidly, shutdown output.
Specifically, in the embodiment of the present application, described first, band-type brake coil voltage detection circuit can be voltage transformer
Or voltage sensor etc..
The rectifier voltage detection circuit is for judging whether relay REL1/REL2 damages, the inspection of band-type brake coil voltage
Slowdown monitoring circuit if relay REL1/REL2 or semiconductor switch Q1 is damaged, is opened for detecting whether semiconductor switch Q1 damages
It closes controller and block is realized to relay REL1/REL2 and semiconductor switch Q1 rapidly, realize the protection to control device.
Example IV
Fig. 4 provides a kind of schematic diagram of band-type brake motor control assembly for the utility model embodiment, as shown in figure 4, this reality
A kind of band-type brake motor control assembly for applying example offer includes: switch controller, switching circuit, current detection circuit, rectifier electricity
Press detection circuit, band-type brake coil voltage detection circuit and absorbing circuit；
Switching circuit as described in embodiment one, current detection circuit as described in embodiment two, rectifier voltage detection circuit,
Band-type brake coil voltage detection circuit and absorbing circuit repeat no more herein as described in embodiment three.
The switch controller includes:
It is connect with the current detection circuit, the current value that the current detection circuit is detected and preset current threshold
The current comparator that value is compared；
Connect with the rectifier voltage detection circuit, the voltage value that the rectifier voltage detection circuit is detected with
The first voltage comparator that preset first voltage threshold value is compared；
It is connect with the band-type brake coil voltage detection circuit, the voltage that the band-type brake coil voltage detection circuit is detected
The second voltage comparator that value is compared with preset second voltage threshold value；
It is connect respectively with the current comparator, first voltage comparator and second voltage comparator, receives the electric current
The comparison result of comparator, first voltage comparator and second voltage comparator, and generate the signal generator of control signal；
It is connect with the signal generator and the switching circuit, the control signal is sent to the switching circuit
Sender unit.
One end of the absorbing circuit is connect with the first end of the band-type brake coil, and the of the other end and the band-type brake coil
The connection of two ends, the absorbing circuit are configured as absorbing the peak voltage generated when band-type brake coil shutdown.
Specifically, in the embodiment of the present application, the absorbing circuit is varistor RV.
RV absorbs protection of the peak voltage realization generated in the shutdown of band-type brake coil to semiconductor switch Q1.
The control method of band-type brake motor control assembly provided by the embodiment of the utility model includes:
Switch controller sends the control signal for controlling the switching circuit and being connected to switching circuit；
First relay of the switching circuit, the second relay according to the control signal conduction power supply and rectifier it
Between connection；
The semiconductor switch of the switching circuit is according to the control signal conduction between rectifier and band-type brake coil
Connection.
Optionally, the control method further include:
The switch controller receives the current value that current detection circuit detects；
The current value is compared by current comparator with preset current threshold；
If the current value exceeds the current threshold, signal generator generates cut-off signals；
The cut-off signals are sent to the switching circuit by sender unit, control the switching circuit shutdown.
Optionally, the control method further include:
The switch controller receives the rectifier voltage value that rectifier voltage detection circuit detects and band-type brake coil electricity
The band-type brake coil voltage value that pressure detection circuit detects；
The rectifier voltage value is compared by voltage comparator with preset first voltage threshold value；
The band-type brake coil voltage value is compared by voltage comparator with preset second voltage threshold value；
If the rectifier voltage value is lower than the first voltage threshold value and/or the band-type brake coil voltage value lower than described
Second voltage threshold value, signal generator generate cut-off signals；
The cut-off signals are sent to the switching circuit by sender unit, control the switching circuit shutdown.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
It should be noted that, in this document, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.
The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are also included in the patent protection scope of the utility model.
Claims (7)
1. a kind of band-type brake motor control assembly is applied to band-type brake motor, which is characterized in that the band-type brake coil of the band-type brake motor is logical
Over commutation device and control device connect to power supply；
The control device includes: switch controller and switching circuit；
The switch controller is connect with the switching circuit, and is sent to the switching circuit and controlled the switching circuit conducting
Or the control signal of shutdown；
The switching circuit includes: the first relay, the second relay and semiconductor switch；
First relay one end is connect with the first end of the power supply, and the first input end of the other end and the rectifier connects
It connects；
Second relay one end is connect with the second end of the power supply, and the second input terminal of the other end and the rectifier connects
It connects；
Described semiconductor switch one end is connect with the cathode output end of the rectifier, and the first of the other end and the band-type brake coil
End connection, or, one end is connect with the cathode output end of the rectifier, the other end is connect with the second end of band-type brake coil.
2. control device according to claim 1, which is characterized in that the control device further include: be arranged described whole
It flows between the cathode output end of device and the first end of the band-type brake coil, detects the electric current inspection of the output current value of the rectifier
Slowdown monitoring circuit；
The current detection circuit is connect with the switch controller, and the current value that will test is sent to the switch control
Device.
3. control device according to claim 2, which is characterized in that the switch controller includes:
Connect with the current detection circuit, the current value that the current detection circuit is detected and preset current threshold into
The current comparator that row compares；
It is connect with the current comparator, receives the comparison result of current comparator, and generate the signal generator of control signal；
It is connect with the signal generator and the switching circuit, the control signal is sent to the signal of the switching circuit
Transmitter.
4. control device according to claim 1, which is characterized in that the control device further include:
The rectifier voltage detection circuit being connect respectively with the cathode output end of the rectifier and cathode output end；
The band-type brake coil voltage detection circuit being connect respectively with the first end and second end of the band-type brake coil；
The rectifier voltage detection circuit and band-type brake coil voltage detection circuit are connect with the switch controller.
5. control device according to claim 4, which is characterized in that the switch controller includes:
The voltage value that is connect with the rectifier voltage detection circuit, and the rectifier voltage detection circuit is detected and pre-
If the first voltage comparator that is compared of first voltage threshold value；
The voltage value for being connect with the band-type brake coil voltage detection circuit, and the band-type brake coil voltage detection circuit being detected
The second voltage comparator being compared with preset second voltage threshold value；
It is connect respectively with the first voltage comparator and second voltage comparator, receives the first voltage comparator and second
The comparison result of voltage comparator, and generate the signal generator of control signal；
It is connect with the signal generator and the switching circuit, the control signal is sent to the signal of the switching circuit
Transmitter.
6. control device according to claim 1, which is characterized in that the control device further include: one end and described armful
The first end of brake cable circle connects, the absorbing circuit that the other end is connect with the second end of the band-type brake coil.
7. control device according to claim 6, which is characterized in that the absorbing circuit is varistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821762915.6U CN208874270U (en) | 2018-10-29 | 2018-10-29 | A kind of band-type brake motor control assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821762915.6U CN208874270U (en) | 2018-10-29 | 2018-10-29 | A kind of band-type brake motor control assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208874270U true CN208874270U (en) | 2019-05-17 |
Family
ID=66471106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821762915.6U Active CN208874270U (en) | 2018-10-29 | 2018-10-29 | A kind of band-type brake motor control assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208874270U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266557A (en) * | 2021-06-09 | 2021-08-17 | 南通大学 | Active band-type brake system of polyester melt metering pump for chemical industry |
| CN115159291A (en) * | 2022-07-25 | 2022-10-11 | 苏州安驰控制系统有限公司 | Elevator brake circuit, detection method and computer storage medium |
-
2018
- 2018-10-29 CN CN201821762915.6U patent/CN208874270U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266557A (en) * | 2021-06-09 | 2021-08-17 | 南通大学 | Active band-type brake system of polyester melt metering pump for chemical industry |
| CN113266557B (en) * | 2021-06-09 | 2024-01-30 | 南通大学 | Active band-type brake system of polyester melt metering pump for chemical industry |
| CN115159291A (en) * | 2022-07-25 | 2022-10-11 | 苏州安驰控制系统有限公司 | Elevator brake circuit, detection method and computer storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10389262B2 (en) | Device for temporarily taking over electrical current from an energy transfer or distribution device, when needed | |
| GB2540008A (en) | DC circuit breaker and method of use | |
| US20090244939A1 (en) | Method and apparatus for resetting silicon controlled rectifiers in a hybrid bridge | |
| CN109088431B (en) | Photovoltaic module turn-off equipment and method and photovoltaic system | |
| CN104779593A (en) | Direct-current solid circuit breaker and control method thereof | |
| CN208874270U (en) | A kind of band-type brake motor control assembly | |
| CN105372552A (en) | Load open circuit detection circuit and method for high-side switch | |
| CN113964863A (en) | Series photovoltaic system capable of automatically achieving module level turn-off | |
| CN102156243B (en) | The detection method of a kind of state of power unit fuse and device | |
| US20190312423A1 (en) | Low-voltage protective device | |
| CN107210298B (en) | Circuit arrangement for protecting a unit to be operated by a power supply system against overvoltage | |
| CN104979851B (en) | A kind of on-off circuit and its control method | |
| CN104538949A (en) | Remote power supply system and cable short circuit fault isolation method | |
| CN110416009B (en) | Arc-free long-life relay switch circuit and controller | |
| JP2018125270A (en) | DC power system safety switchgear | |
| CN201781268U (en) | Over-voltage protection device of inverter | |
| CN105490244A (en) | Z source direct-current circuit breaker | |
| CN211266446U (en) | Circuit breaker protection device | |
| CN213402445U (en) | Detection protection circuit, device and electrical equipment | |
| CN115065039A (en) | Hybrid circuit breaker | |
| CN208386436U (en) | A kind of modularization multi-level converter based on IGCT | |
| Nuutinen et al. | LVDC customer-end inverter operation in short circuit | |
| CN214125141U (en) | Current transformer protection circuit and arc discharge detection circuit | |
| CN204794032U (en) | Fault handling circuit and converter of converter braking circuit | |
| CN108233902A (en) | A kind of solid-state power controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215000 No. 1000 Songhua Road, Guo Xiang street, Wuzhong Economic and Technological Development Zone, Suzhou, Jiangsu Patentee after: Suzhou Weichuang Electrical Technology Co., Ltd. Address before: 215000 No. 1000 Songhua Road, Guo Xiang street, Wuzhong Economic and Technological Development Zone, Suzhou, Jiangsu Patentee before: SUZHOU WEICHUANG ELECTRICAL EQUIPMENT TECHNOLOGY CO., LTD. |