CN109391181A - The fast control module of section and motor control system - Google Patents
The fast control module of section and motor control system Download PDFInfo
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- CN109391181A CN109391181A CN201710667005.3A CN201710667005A CN109391181A CN 109391181 A CN109391181 A CN 109391181A CN 201710667005 A CN201710667005 A CN 201710667005A CN 109391181 A CN109391181 A CN 109391181A
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- isolated location
- switching
- isolation
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- switch terminal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
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- Power Engineering (AREA)
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Abstract
The present invention provides a kind of motor control system comprising a motor module, one section of fast control module and a processing module.The fast control module of section includes one first isolated location and one second isolated location.First isolated location provides one first switching notice signal to processing module according to one first switching signal.Second isolated location provides one second switching notice signal to processing module according to one second switching signal.Processing module is according to the first switching notice signal and the revolving speed of the second switching notice signal adjustment motor.
Description
Technical field
The present invention relates to a kind of section of fast control module and motor control systems, more particularly to a kind of numerically controlled section of speed
Control module, and the motor control system with described section of fast control module.
Background technique
The motor rotary speed switching circuit of conventional extraction hood, is mostly designed in the form of one-to-one, however this revolving speed
The demand that user now is unable to satisfy for a variety of revolving speeds is set, in addition, its corresponding circuit be then it is relative complex and
Do not have extendibility.
Therefore it provides a kind of circuit is relatively easy and has the section speed control module of extendibility, then it is one of present industry
Important topic.
Summary of the invention
In view of this, the present invention provides a kind of motor control system with section speed control module, comprising: a motor mould
Block；One section of fast control module, is electrically connected motor, wherein described section of fast control module includes: one first isolated location, tool
There are one first side of isolation and one second side of isolation, the first side of isolation includes one first switch terminal and one second switch terminal,
In, the first switch terminal is electrically connected one first switching electric potential to receive one first switching signal of the first switching electric potential generation, and the
Two switch terminals are electrically connected a reference potential, and the second side of isolation exports one first switching notice signal according to the first switching signal；
One second isolated location, have one first side of isolation and one second side of isolation, the second side of isolation include one first switch terminal with
And one second switch terminal, wherein the first switch terminal is electrically connected one second switching electric potential to receive the generation of the second switching electric potential
One second switching signal, the second switch terminal are electrically connected reference potential, and the second side of isolation is according to the second switching signal output one the
Two switching notice signals；One processing module is electrically connected section speed control module, wherein section speed control module provides the first switching
To processing module, processing module is cut according to the first switching notice signal and second for notification signal and the second switching notice signal
Change the revolving speed of notification signal adjustment motor.
Preferably, the first isolated location further include: the first switch terminal of the first isolated location is arranged in a first diode
And first isolated location the second switch terminal between.
Preferably, the first isolated location further include: the first switch terminal of the second isolated location is arranged in one second diode
And second isolated location the second switch terminal between.
Preferably, the second side of isolation of the first isolated location includes: one first output end；An and second output terminal；Its
In, a first capacitor is arranged between the first output end of the second isolated location and the second output terminal of the second isolated location,
The second output terminal of second isolated location is electrically connected an earthing potential, and the first output end of the second isolated location passes through at least one
Impedance is electrically connected a DC voltage；Wherein, the first output end of the second isolated location exports the first switching notice signal.
Preferably, the second side of isolation of the second isolated location includes: one first output end；An and second output terminal；Its
In, one second capacitor is arranged between the first output end of the second isolated location and the second output terminal of the second isolated location,
The second output terminal of second isolated location is electrically connected an earthing potential, and the first output end of the second isolated location passes through at least one
Impedance is electrically connected a DC voltage；Wherein, the first output end of the second isolated location exports the second switching notice signal.
Preferably, the first isolated location and the second isolated location are an optical coupling barrier assembly respectively.
Preferably, motor is a Brushless DC motor.
The present invention provides a kind of section of fast control modules, for being electrically connected a motor module and a processing module, section
Fast control module includes: one first isolated location, has one first side of isolation and one second side of isolation, the first side of isolation packet
Include one first switch terminal and one second switch terminal, wherein the first switch terminal is electrically connected one first switching electric potential to receive the
One first switching signal that one switching electric potential generates, the second switch terminal are electrically connected a reference potential, and the second side of isolation is according to the
One switching signal exports one first switching notice signal；One second isolated location, have one first side of isolation and one second every
From side, the second side of isolation includes one first switch terminal and one second switch terminal, wherein the first switch terminal is electrically connected one second
Switching electric potential, the second switch terminal are electrically connected reference potential, and the second side of isolation is according to one second switching of the second switching electric potential output
Notification signal；Wherein, section speed control module provides the first switching notice signal and the second switching notice signal to processing module,
Processing module is according to the first switching notice signal and the revolving speed of the second switching notice signal adjustment motor module.
Preferably, the first isolated location further include: the first switch terminal of the first isolated location is arranged in a first diode
And first isolated location the second switch terminal between.
Preferably, the first isolated location further include: the first switch terminal of the second isolated location is arranged in one second diode
And second isolated location the second switch terminal between.
Preferably, the second side of isolation of the first isolated location includes: one first output end；An and second output terminal；Its
In, a first capacitor is arranged between the first output end of the second isolated location and the second output terminal of the second isolated location,
The second output terminal of second isolated location is electrically connected an earthing potential, and the first output end of the second isolated location passes through at least one
Impedance is electrically connected a DC voltage；Wherein, the first output end of the second isolated location exports the first switching notice signal.
Preferably, the second side of isolation of the second isolated location includes: one first output end；An and second output terminal；Its
In, one second capacitor is arranged between the first output end of the second isolated location and the second output terminal of the second isolated location,
The second output terminal of second isolated location is electrically connected an earthing potential, and the first output end of the second isolated location passes through at least one
Impedance is electrically connected a DC voltage；Wherein, the first output end of the second isolated location exports the second switching notice signal.
Preferably, the first isolated location and the second isolated location are an optical coupling barrier assembly respectively.
Preferably, motor module is a Brushless DC motor.
In conclusion the motor control system of the embodiment of the present invention, controls mould using the section speed for providing digital controlled signal
Block not only can simplify circuit, can also be greatly reduced instead of complicated complicated multi-section motor rotating-speed control circuit is needed
Cost.
For the above-mentioned feature and advantage of the present invention can be clearer and more comprehensible, preferred embodiment is cited below particularly, and appended by cooperation
Schema is described in detail below.
Detailed description of the invention
Fig. 1 is painted the schematic diagram of the motor control system of the embodiment of the present invention.
Fig. 2 is painted the schematic diagram of the section speed control module of the embodiment of the present invention.
Specific embodiment
Various exemplary embodiments will be more fully described referring to alterations below, shown in alterations
Exemplary embodiments.However, concept of the present invention may embody in many different forms, and it should not be construed as limited by institute herein
The exemplary embodiments of elaboration.Specifically, providing these exemplary embodiments makes the present invention that will be detailed and complete, and will
The scope of concept of the present invention is sufficiently conveyed to those who familiarize themselves with the technology.In all schemas, the area Ceng Ji can be lavished praise on oneself in order to clear
Size and relative size.Similar number indicates similar assembly always.
It should be understood that although herein various assemblies may be described using term first, second, third, etc., these groups
Part should not be limited by these terms.These terms are to distinguish a component and another component.Therefore, first group be discussed herein below
Part can be described as the second component without departing from the teaching of concept of the present invention.As used herein, term " and/or " include associated
All combinations for listing any one of project and one or more.
Schema will be cooperated to illustrate the motor control system at least one embodiment below, however, following embodiments
Not to limit this disclosure.
(embodiment of motor control system of the present invention)
Fig. 1 and Fig. 2 is please referred to, Fig. 1 is schematically shown as the schematic diagram of the motor control system of the embodiment of the present invention.Fig. 2 is painted
For the schematic diagram of the section speed control module of the embodiment of the present invention.
Motor control system 1 includes that 10, one sections of a processing module fast control modules 11, a motor modules 12, one control mould
Block 13 and a starting module 14.
Wherein processing module 10 is electrically connected starting module 14, and starting module 14 is electrically connected motor module 12.Control mould
Block 13 is electrically connected section speed control module 11, the then electrically connected processing module 10 of section speed control module 11.
In the present embodiment, control module 13 includes a plurality of buttons, can be used as the foundation of 12 speed-changing of motor module.
Processing module 10 is a microprocessing unit (Micro Processing Unit, MCU) or a central processing unit (Central
Processing Unit, CPU).Starting module 14 is then circuit, capacitor needed for having starter motor module 14.
In the present embodiment, motor module 12 is a Brushless DC motor (Brushless Direct Current
Motor, BLDC).DC Brushless Motor does not have brush and commutator.It is AC synchronous motor in its structure, utilizes power electronics
Technology (inverter) input exchange signal is to motor.But these AC signals are not sine waves, only two-way direct current, waveform
There is no limit.
In the present embodiment, section speed control module 11 includes one first isolated location IC1, one second isolated location IC2, one
Third isolated location IC3 and one the 4th isolated location IC4.
First isolated location IC1 includes one first side of isolation and one second side of isolation.In the present embodiment, the first isolation
The first side of isolation of unit IC1 is a diode, and the second side of isolation of the first isolated location IC1 is then an optical coupling crystal
Pipe.
In the present embodiment, the first side of isolation includes that one first switch terminal (not shown) and one second switch terminal (are schemed not
Show).First switch terminal (not shown) of the first side of isolation is electrically connected one first switching electric potential AC1 by one first impedance R1,
It is, a button of control module 13 is electrically connected to, for receiving one first switching letter of the first switching electric potential AC1 generation
Number.Second switch terminal (not shown) of the first side of isolation, then be electrically connected to an earthing potential.The fast control module 11 of section is also wrapped
A first diode D1 is included to be arranged between the first switch terminal (not shown) and the second switch terminal (not shown).It is, the
The cathode terminal (Cathode) of one diode D1 is electrically connected to the first switch terminal of the first side of isolation of the first isolated location IC1
(not shown), the anode tap (Anode) of first diode D1 are then electrically connected to the first side of isolation of the first isolated location IC1
Second switch terminal (not shown).
In the present embodiment, the second side of isolation of the first isolated location IC1 includes one first output end BIT0 and 1 the
Two output end (not shown).The first output end of the second side of isolation of the first isolated location IC1 is arranged in one first capacitor C1
Between BIT0 and second output terminal.In addition, the first output end BIT0 of the second side of isolation of the first isolated location IC1 is to pass through
One the 5th impedance R5 is electrically connected a DC voltage VDD.Second output terminal (the figure of the second side of isolation of first isolated location IC1
Do not show) it is then to be electrically connected earthing potential.In the present embodiment, the first output of the second side of isolation of the first isolated location IC1
End BIT0 be electrically connected to processing module 10, it is, the first isolated location IC1 of section speed control module 11 according to pass through first
The one first switching notice signal of the corresponding first switching electric potential AC1 of output end BIT0 transmission one is to processing module 10.
In the present embodiment, the second isolated location IC2 includes one first side of isolation and one second side of isolation.In this implementation
In example, the first side of isolation of the second isolated location IC2 is a diode, and the second side of isolation of the second isolated location IC2 is then
One photo-coupled transistor.
In the present embodiment, the first side of isolation includes that one first switch terminal (not shown) and one second switch terminal (are schemed not
Show).First switch terminal (not shown) of the first side of isolation is electrically connected one second switching electric potential AC2 by one second impedance R2,
It is, a button of control module 13 is electrically connected to, for receiving one second switching letter of the second switching electric potential AC2 generation
Number.Second switch terminal (not shown) of the first side of isolation, then be electrically connected to an earthing potential.The fast control module 11 of section is also wrapped
One second diode D2 is included to be arranged between the first switch terminal (not shown) and the second switch terminal (not shown).It is, the
The cathode terminal (Cathode) of two diode D2 is electrically connected to the first switch terminal of the first side of isolation of the second isolated location IC2
(not shown), the anode tap (Anode) of the second diode D2 are then electrically connected to the first side of isolation of the second isolated location IC2
Second switch terminal (not shown).
In the present embodiment, the second side of isolation of the second isolated location IC2 includes one first output end BIT1 and 1 the
Two output end (not shown).The first output end of the second side of isolation of the second isolated location IC2 is arranged in one second capacitor C2
Between BIT1 and second output terminal (not shown).In addition, the first output end of the second side of isolation of the second isolated location IC2
BIT1 is to be electrically connected a DC voltage VDD by one the 6th impedance R6.The second of the second side of isolation of second isolated location IC2
Output end (not shown) is then to be electrically connected earthing potential.In the present embodiment, the second side of isolation of the second isolated location IC2
First output end BIT1 is electrically connected to processing module 10, it is, the second isolated location IC2 of section speed control module 11 according to
Pass through the one second switching notice signal of the corresponding second switching electric potential AC2 of the first output end BIT1 transmission one to processing module 10.
In the present embodiment, third isolated location IC3 includes one first side of isolation and one second side of isolation.In this implementation
In example, the first side of isolation of third isolated location IC3 is a diode, and the second side of isolation of third isolated location IC3 is then
One photo-coupled transistor.
In the present embodiment, the first side of isolation includes that one first switch terminal (not shown) and one second switch terminal (are schemed not
Show).First switch terminal (not shown) of the first side of isolation is electrically connected a third switching electric potential AC3 by a third impedance R3,
It is, a button of control module 13 is electrically connected to, for receiving the third switching letter of third switching electric potential AC3 generation
Number.Second switch terminal (not shown) of the first side of isolation, then be electrically connected to an earthing potential.The fast control module 11 of section is also wrapped
A third diode D3 is included to be arranged between the first switch terminal (not shown) and the second switch terminal (not shown).It is, the
The cathode terminal (Cathode) of three diode D3 is electrically connected to the first switch terminal of the first side of isolation of third isolated location IC3
(not shown), the anode tap (Anode) of third diode D3 are then electrically connected to the first side of isolation of third isolated location IC3
Second switch terminal (not shown).
In the present embodiment, the second side of isolation of third isolated location IC3 includes one first output end BIT2 and 1 the
Two output end (not shown).The first output end of the second side of isolation of third isolated location IC3 is arranged in one third capacitor C3
Between BIT2 and second output terminal (not shown).In addition, the first output end of the second side of isolation of third isolated location IC3
BIT2 is to be electrically connected a DC voltage VDD by one the 7th impedance R7.The second of the second side of isolation of third isolated location IC3
Output end (not shown) is then to be electrically connected earthing potential.In the present embodiment, the second side of isolation of third isolated location IC3
First output end BIT2 is electrically connected to processing module 10, it is, the third isolated location IC3 of section speed control module 11 according to
Pass through the one second switching notice signal of the corresponding third switching electric potential AC3 of the first output end BIT2 transmission one to processing module 10.
In the present embodiment, the 4th isolated location IC4 includes one first side of isolation and one second side of isolation.In this implementation
In example, the first side of isolation of the 4th isolated location IC4 is a diode, and the second side of isolation of the 4th isolated location IC4 is then
One photo-coupled transistor.
In the present embodiment, the first side of isolation includes that one first switch terminal (not shown) and one second switch terminal (are schemed not
Show).First switch terminal (not shown) of the first side of isolation is electrically connected one the 4th switching electric potential AC4 by one the 4th impedance R4,
It is, a button of control module 13 is electrically connected to, for receiving one the 4th switching letter of the 4th switching electric potential AC4 generation
Number.Second switch terminal (not shown) of the first side of isolation, then be electrically connected to an earthing potential.The fast control module 11 of section is also wrapped
One the 4th diode D4 is included to be arranged between the first switch terminal (not shown) and the second switch terminal (not shown).It is, the
The cathode terminal (Cathode) of four diode D4 is electrically connected to the first switch terminal of the first side of isolation of the 4th isolated location IC4
(not shown), the anode tap (Anode) of the 4th diode D4 are then electrically connected to the first side of isolation of the 4th isolated location IC4
Second switch terminal (not shown).
In the present embodiment, the second side of isolation of the 4th isolated location IC4 includes one first output end BIT3 and 1 the
Two output end (not shown).The first output end of the second side of isolation of the 4th isolated location IC4 is arranged in one the 4th capacitor C4
Between BIT3 and second output terminal (not shown).In addition, the first output end of the second side of isolation of the 4th isolated location IC4
BIT3 is to be electrically connected a DC voltage VDD by one the 8th impedance R8.The second of the second side of isolation of 4th isolated location IC4
Output end (not shown) is then to be electrically connected earthing potential.In the present embodiment, the second side of isolation of the 4th isolated location IC4
First output end BIT3 is electrically connected to processing module 10, it is, the 4th isolated location IC4 of section speed control module 11 according to
Pass through the one second switching notice signal of the corresponding 4th switching electric potential AC4 of the first output end BIT3 transmission one to processing module 10.
In the present embodiment, the first isolated location IC1, the second isolated location IC2, third isolated location IC3 and the 4th
Isolated location IC4 is an optical coupling barrier assembly respectively.First isolated location IC1, the second isolated location IC2, third isolation are single
Second switch terminal of first IC3 and respective first side of isolation of the 4th isolated location IC4 is all electrically connected to one first with reference to electricity
Position V1, can be adjusted, in the present invention with no restriction according to actual needs.
In the present embodiment, the first isolated location IC1, the second isolated location IC2, third isolated location IC3 and the 4th
First switch terminal (not shown) of respective first side of isolation of isolated location IC4 and the second switch terminal (figure is not) are electrical respectively
The different potentials of connection are interchangeable, it is, the first isolated location IC1, the second isolated location IC2, third isolated location IC3 with
And the 4th first switch terminal (not shown) of respective first side of isolation of isolated location IC4 be electrically connected to one first reference potential
V1, and the first isolated location IC1, the second isolated location IC2, third isolated location IC3 and the 4th isolated location IC4 are respective
Second switch terminal (not shown) of the first side of isolation is then to be respectively and electrically connected to the first switching electric potential AC1, the second switching electric potential
AC2, third switching electric potential AC3 and the 4th switching electric potential AC4.
In the present embodiment, processing module 10 is provided according to the first isolated location IC1 the first switching notice signal, second
The third switching notice signal and that the second switching notice signal that isolated location IC2 is provided, third isolated location IC3 are provided
The revolving speed for the 4th switching notice signal adjustment motor module 12 that four isolated location IC4 are provided.In the present embodiment, the first isolation
Second switching notice signal of the first switching notice signal, the second isolated location IC2 offer that unit IC1 is provided, third isolation
The 4th switching notice signal that the third switching notice signal and the 4th isolated location IC4 that unit IC3 is provided provide can be by
It is considered as digital signal and is supplied to processing module 10, it is, the control of motor rotary speed is converted to by multiplex circuit digital control
Signal, in this way, can simplify circuit and cost is greatly reduced.
In the present embodiment, the quantity of isolated location can be adjusted according to actual demand, in the present invention with no restriction.
(possibility effect of embodiment)
In conclusion the motor control system of the embodiment of the present invention, controls mould using the section speed for providing digital controlled signal
Block not only can simplify circuit, can also be greatly reduced instead of complicated complicated multi-section motor rotating-speed control circuit is needed
Cost.
The above description is only an embodiment of the present invention, not to limit to the scope of the patents of the invention.
Claims (10)
1. a kind of motor control system with section speed control module, which is characterized in that the motor control system includes:
One motor module；
One section of fast control module, is electrically connected the motor module, wherein described section of fast control module include:
One first isolated location, has one first side of isolation and one second side of isolation, and first side of isolation includes one the
One switch terminal and one second switch terminal, wherein it is described to receive that first switch terminal is electrically connected one first switching electric potential
One first switching signal that first switching electric potential generates, second switch terminal are electrically connected a reference potential, described second every
One first switching notice signal is exported according to first switching signal from lateral root；
One second isolated location, has one first side of isolation and one second side of isolation, and second side of isolation includes one first
Switch terminal and one second switch terminal, wherein first switch terminal is electrically connected one second switching electric potential to receive described the
One second switching signal that two switching electric potentials generate, second switch terminal are electrically connected the reference potential, described second every
One second switching notice signal is exported according to second switching signal from lateral root；And
One processing module is electrically connected described section of fast control module, wherein described section of fast control module provides first switching
To the processing module, the processing module is logical according to first switching for notification signal and the second switching notice signal
Know that signal and the second switching notice signal adjust the revolving speed of the motor module.
2. motor control system as described in claim 1, which is characterized in that first isolated location further include:
One first diode is arranged in described in the first switch terminal and first isolated location of first isolated location
Between second switch terminal.
3. motor control system as claimed in claim 2, which is characterized in that first isolated location further include:
One second diode, be arranged in second isolated location first switch terminal and second isolated location
Between second switch terminal.
4. motor control system as described in claim 1, which is characterized in that second isolation of first isolated location
Side includes:
One first output end；And
One second output terminal；
Wherein, first output end and second isolated location of second isolated location is arranged in a first capacitor
The second output terminal between, the second output terminal of second isolated location is electrically connected an earthing potential, described
First output end of second isolated location is electrically connected a DC voltage by an at least impedance；
Wherein, first output end of second isolated location exports the first switching notice signal.
5. motor control system as described in claim 1, which is characterized in that second isolation of second isolated location
Side includes:
One first output end；And
One second output terminal；
Wherein, first output end and second isolated location of second isolated location is arranged in one second capacitor
The second output terminal between, the second output terminal of second isolated location is electrically connected an earthing potential, described
First output end of second isolated location is electrically connected a DC voltage by an at least impedance；
Wherein, first output end of second isolated location exports the second switching notice signal.
6. a kind of section of fast control module, for being electrically connected a motor module and a processing module, which is characterized in that described section
Fast control module includes:
One first isolated location, has one first side of isolation and one second side of isolation, and first side of isolation includes one the
One switch terminal and one second switch terminal, wherein it is described to receive that first switch terminal is electrically connected one first switching electric potential
One first switching signal that first switching electric potential generates, second switch terminal are electrically connected a reference potential, described second every
One first switching notice signal is exported according to first switching signal from lateral root；And
One second isolated location, has one first side of isolation and one second side of isolation, and second side of isolation includes one first
Switch terminal and one second switch terminal, wherein first switch terminal is electrically connected one second switching electric potential to receive described the
One second switching signal that two switching electric potentials generate, second switch terminal are electrically connected the reference potential, described second every
One second switching notice signal is exported according to second switching signal from lateral root；
Wherein, described section of fast control module provides the first switching notice signal and the second switching notice signal to institute
Processing module is stated, the processing module adjusts institute according to the first switching notice signal and the second switching notice signal
State the revolving speed of motor module.
7. section speed control module as claimed in claim 6, which is characterized in that first isolated location further include:
One first diode is arranged in described in the first switch terminal and first isolated location of first isolated location
Between second switch terminal.
8. section speed control module as claimed in claim 7, which is characterized in that first isolated location further include:
One second diode, be arranged in second isolated location first switch terminal and second isolated location
Between second switch terminal.
9. section speed control module as claimed in claim 6, which is characterized in that second isolation of first isolated location
Side includes:
One first output end；And
One second output terminal；
Wherein, first output end and second isolated location of second isolated location is arranged in a first capacitor
The second output terminal between, the second output terminal of second isolated location is electrically connected an earthing potential, described
First output end of second isolated location is electrically connected a DC voltage by an at least impedance；
Wherein, first output end of second isolated location exports the first switching notice signal.
10. section speed control module as claimed in claim 6, which is characterized in that described the second of second isolated location every
Include: from side
One first output end；And
One second output terminal；
Wherein, first output end and second isolated location of second isolated location is arranged in one second capacitor
The second output terminal between, the second output terminal of second isolated location is electrically connected an earthing potential, described
First output end of second isolated location is electrically connected a DC voltage by an at least impedance；
Wherein, first output end of second isolated location exports the second switching notice signal.
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| CN201710667005.3A CN109391181A (en) | 2017-08-07 | 2017-08-07 | The fast control module of section and motor control system |
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| CN201710667005.3A CN109391181A (en) | 2017-08-07 | 2017-08-07 | The fast control module of section and motor control system |
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| CN104242779A (en) * | 2014-10-15 | 2014-12-24 | 曾庆 | Smoke exhaust ventilator controller |
| CN104518717A (en) * | 2015-01-06 | 2015-04-15 | 沈阳辽通电气有限公司 | Direct current speed regulator of series-excited motor |
| TWM510429U (en) * | 2015-06-25 | 2015-10-11 | Lan Chang Electric Co Ltd | AC/DC power conversion control module of central air conditioning system |
| CN205354290U (en) * | 2016-01-08 | 2016-06-29 | 三峡大学 | Underground garage CO toxic gas monitoring alarm device based on 51 single chip microcomputer control |
| CN112394209A (en) * | 2020-11-13 | 2021-02-23 | 四川泛华航空仪表电器有限公司 | Analog signal redundancy switching system with self-locking protection |
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Application publication date: 20190226 |