CN209982461U - Switching circuit - Google Patents
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- CN209982461U CN209982461U CN201920806485.1U CN201920806485U CN209982461U CN 209982461 U CN209982461 U CN 209982461U CN 201920806485 U CN201920806485 U CN 201920806485U CN 209982461 U CN209982461 U CN 209982461U
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Abstract
The utility model discloses a switch circuit, including TMR magnetic resistance chip, for the power supply chip of TMR magnetic resistance chip power supply and be used for first binding post and the second binding post be connected with external control ware, power supply chip's negative pole input ground connection still includes positive negative pole to the circuit of trading, positive negative pole to the bridge circuit of trading the circuit for having four outer ends, four outer ends are first end, second end, third end and fourth end respectively, first end and third end are relative, second end and fourth end are relative, first end is connected to first binding post, the third end is connected to second binding post, the second end is connected to power supply chip's positive input end, fourth end ground connection. Compared with the prior art, the utility model has the advantages of: through setting up positive negative pole and right swap circuit, need not to distinguish when having realized that switch circuit's two binding post and external controller are connected that positive negative pole all can normally work, the wiring operation is simpler, adopts the TMR magnetic resistance chip that has the latch function, reduces external circuit and disturbs.
Description
Technical Field
The utility model relates to a proximity switch, especially proximity switch's switching circuit.
Background
The current elevator or hoist floor proximity switches are bistable switches of the reed switch variety. The principle is that two spring pieces which can be closed and opened are arranged in a glass tube, a small magnetic ring or a magnetic sheet is sleeved on a reed tube, an external large magnet is used for driving the reed tube to be closed, after the large magnet leaves, the reed in the reed tube is still kept in a closed state due to the fact that the small magnetic ring on the reed tube is magnetic, and when the external large magnet is reversely driven, the reed closed by the reed tube can be opened due to the fact that the magnetism is larger than that of the small magnetic ring fixed on the reed tube, and therefore the function of magnetic preservation is achieved.
At present, the switch has unstable structural performance, poor shock resistance and high failure rate in low-temperature environment, and has the following defects in actual use: 1. due to transportation vibration and installation knocking in the switch use environment, the distance between reed leaves in the reed pipe can be changed and the reed pipe can not work normally when the switch falls to the ground, and the shock resistance is poor; 2. the reed inside the reed switch can be changed in a low-temperature environment to cause switch abnormity. Especially, the performance switch is always closed and cannot work at the temperature of-20 ℃ in northern areas, and the elevator cannot work normally. 3. The existing switch has no LED indicating function, and because the proximity switch is in a position where the sight environment is not good and the proximity switch is not easy to install, when an elevator lifting system breaks down, the working state of the proximity switch cannot be visually judged, and the proximity switch needs to be detached and then judged by an auxiliary instrument, so that inconvenience is brought to subsequent after-sale maintenance of the elevator.
The existing bistable switch also adopts a structure of an MR magnetoresistive chip, such as that disclosed in journal literatures of magnetic resistance type proximity switch performance comparison with Hall type proximity switch performance, Henan sciences, Qin Yuwei, Zhanying, volume 29, No. 5, and 5 months 2011, but the external circuit is a 3-wire type, and three terminals are + Vcc and V respectively03And ground. The main circuit of the switch is divided into an NPN circuit and a PNP circuit, and the switch is connected with the follow-up circuit and is a frequency converter circuit: first, the conventional frequency converter has a positive electrode power supply terminal, a negative electrode power supply terminal and a signal input terminal, and the frequency converter circuit itself also has an NPN circuit and a PNP circuit, and when a 3-wire switch is usedSwitches corresponding to NPN and PNP circuits must be accessed, otherwise the switches cannot be normal, and therefore the wiring mode is complex; secondly, the mainstream converter in the market at present only has a signal input terminal, a common port, and both are used for the switch wiring, and then 3 line switches can't normally insert, and the commonality is not enough. In addition, half of the self power consumption of the 3-wire switch is about 1mA, and the excessively high self power consumption is unfavorable for the load circuit of the frequency converter, and if the 3-wire switch is connected in parallel, the situation is serious, and the frequency converter can be even burnt.
To this end, the applicant of the present invention has made an improvement to the above-mentioned prior art, such as an electronic proximity switch disclosed in chinese patent application No. 201610338246.9, in which the switching circuit includes an MR magnetoresistive chip, a voltage regulator circuit for providing a stable operating voltage to the MR magnetoresistive chip, and an analog switch, an output terminal of the MR magnetoresistive chip is connected to an input terminal of the analog switch, an output terminal of the analog switch serves as a positive output terminal of the switching circuit, and a ground terminal of the MR magnetoresistive chip serves as a negative output terminal of the switching circuit, thereby forming a 2-wire switch. However, when the switch circuit is connected with the frequency converter, the positive and negative electrodes of the switch circuit and the signal input end and the common end of the frequency converter need to be carefully confirmed, the switch circuit can normally work only by corresponding connection, and certain inconvenience exists in the wiring operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to the problem that above-mentioned prior art exists, provide a switch circuit, it is more simple to simplify the wiring operation, improves the commonality.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a switch circuit, includes TMR magnetic resistance chip, for the power chip of TMR magnetic resistance chip power supply and be used for first binding post and the second binding post of being connected with external control ware, the negative pole input ground connection of power chip, its characterized in that: the power supply chip is characterized by further comprising a positive and negative pole switching circuit, wherein the positive and negative pole switching circuit is a bridge circuit with four external connection ends, the four external connection ends are respectively a first end, a second end, a third end and a fourth end, the first end is opposite to the third end, the second end is opposite to the fourth end, the first end is connected to the first wiring terminal, the third end is connected to the second wiring terminal, the second end is connected to the positive input end of the power supply chip, and the fourth end is grounded.
Preferably, the bridge circuit is such that the positive-negative polarity switching circuit includes a first diode, a second diode, a third diode and a fourth diode, the positive electrode of the first diode is connected with the negative electrode of the second diode, and the junction of the positive electrode of the first diode and the negative electrode of the second diode forms the first end; the cathode of the first diode is connected with the cathode of the third diode, and the joint of the cathode of the first diode and the cathode of the third diode forms the second end; the anode of the third diode is connected with the cathode of the fourth diode, and the junction of the anode of the third diode and the cathode of the fourth diode forms the third end; and the cathode of the fourth diode is connected with the anode of the second diode, and the junction of the cathode of the fourth diode and the anode of the second diode forms the fourth end.
Further, according to the utility model discloses an aspect, for the normal work of ensureing external control ware and power chip, still include amplifier circuit, amplifier circuit includes emitting diode, resistance, fifth diode, first triode and second triode, the base of first triode is connected with power chip's output, the projecting pole is connected with TMR magnetic resistance chip's output, the one end of resistance is connected with power chip's positive input end, the other end is connected with the positive pole of fifth diode, the negative pole of fifth diode is connected with emitting diode's positive pole, emitting diode's negative pole is connected with the collecting electrode of first triode, the base of second triode is connected with fifth diode's positive pole, collecting electrode ground connection, projecting pole then are connected to power chip's positive input.
Further, according to the utility model discloses a further aspect, for the normal work of ensureing external control ware and power chip, still include amplifier circuit, amplifier circuit includes resistance, fifth diode, sixth diode, seventh diode, first triode and second triode, the base of first triode is connected with power chip's output, the projecting pole is connected with TMR magnetic resistance chip's output, the one end of resistance is connected with power chip's positive input end, the other end is connected with the positive pole of fifth diode, sixth diode and seventh diode syntropy are established ties, the negative pole of seventh diode is connected with the collecting electrode of first triode, the base of second triode is connected with the positive pole of fifth diode, collecting electrode ground connection, projecting pole then are connected to power chip's positive input.
Further, in order to reduce interference, the voltage is stably output to the TMR magnetoresistive chip, and the TMR magnetoresistive chip also comprises a filter circuit which is arranged between the power supply chip and the TMR magnetoresistive chip.
Preferably, the filter circuit includes an eighth diode, an electrolytic capacitor, and a capacitor, an anode of the eighth diode is grounded, and a cathode of the eighth diode is connected to an anode input terminal of the power chip, an anode of the electrolytic capacitor is connected to an anode input terminal of the power chip, and a cathode of the electrolytic capacitor is grounded, and two ends of the capacitor are respectively connected to an output terminal of the power chip and a ground.
Compared with the prior art, the utility model has the advantages of: through setting up positive negative pole and right swap circuit, need not to distinguish when having realized that switch circuit's two binding post and external controller are connected that positive negative pole all can normally work, the wiring operation is simpler, adopts the TMR magnetic resistance chip that has the latch function, reduces external circuit and disturbs.
Drawings
Fig. 1 is a schematic diagram of a first embodiment of a switching circuit according to the present invention;
fig. 2 is a schematic diagram of a second embodiment of the switching circuit of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Referring to fig. 1, a switch circuit is mainly used for a proximity switch, and includes a TMR magnetoresistive chip 1, an anode-cathode switching circuit 2, a power chip 3, an amplifier circuit 4, a filter circuit 5, a first connection terminal J1, and a second connection terminal J2.
The TMR magnetoresistive chip 1 is a bipolar chip with a latching magnetic group, is used for sensing an N/S pole of a magnetic field and then outputs high and low electric frequency, the working voltage of the TMR magnetoresistive chip is about 2.5V, the working current of the TMR magnetoresistive chip is about 1.5 muA, and the working current slightly rises along with the rise of the temperature during working but does not exceed 10 muA at most. Since the TMR magnetoresistive chip 1 has a latch-type function (also called a memory function), when the chip is at a high level or a low level, no specific magnetic driving material (such as a magnet fitted to a switch) or the like (providing a magnetic field of the same gauss magnitude) is present, and other external disturbances do not cause the chip level to flip, because the memory function can be realized. When the TMR magnetoresistive chip 1 is externally connected and used together with a capacitive or inductive circuit, the chip level of the circuit cannot be randomly turned over due to interference.
When the TMR magnetoresistive chip 1 is sensed by a magnet or other magnetic substances, a high-level or low-level signal is output, and a corresponding signal is given to a frequency converter or a control panel (when the TMR magnetoresistive chip is applied to a door machine, the controller is a frequency converter, and other scenes are applied to other controllers). When switch circuit is used on the door machine of elevator as proximity switch, magnet is installed on the door machine, be in directly over the switch, horizontal round trip movement, TMR magnetic resistance chip 1 can respond to switch output level just facing a polar surface of magnetic grouping switch, when magnet leaves back the process switch again, the upset of 1 level of TMR magnetic resistance chip in the switch is impeld in the magnet response, for the upset of the same polar surface drive TMR magnetic resistance chip 1 polarity of magnet, and output signal gives the converter. The effective induction distance between the magnet and the switch is about 5-20 mm. Because TMR magnetoresistive chip 1's operating current is less, belongs to the micro-power consumption, the signal input part of converter provides the power for TMR magnetoresistive chip 1 and can make TMR magnetoresistive chip 1 normally work, and the influence of TMR magnetoresistive chip 1 self power consumption to the load circuit of converter is very little.
The positive-negative polarity inverting circuit 2 employs a bridge circuit (full bridge circuit) in the present embodiment. The bridge circuit is a common bridge circuit and is provided with four external connection ends, wherein the four external connection ends comprise a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, the anode of the first diode D1 is connected with the cathode of the second diode D2, and the connection part (a first end) of the anode of the first diode D1 and the cathode of the second diode D2 is connected with a first connection terminal J1; the cathode of the first diode D1 is connected with the cathode of the third diode D3, and the joint (second end) of the cathode of the first diode D1 and the cathode of the third diode D3 is connected with the anode input end of the power supply chip 3; the anode of the third diode D3 is connected with the cathode of the fourth diode D4, and the junction (third end) between the anode of the third diode D3 and the cathode of the fourth diode D4 is connected with the second connection terminal J2; the cathode of the fourth diode D4 is connected to the anode of the second diode D2, and the junction (fourth end) between the cathode of the fourth diode D4 and the anode of the second diode D2 is grounded.
The working current of the power chip 3 is 1.5 muA, the anode input end of the power chip is connected with the second end of the anode and cathode switching circuit 2, and the cathode input end of the power chip 3 is grounded. The positive pole input end of the TMR magnetic resistance chip 1 is connected with the output end of the power supply chip 3, and the negative pole input end is grounded. The first end of the positive and negative polarity reversing circuit 2 is connected to the first connection terminal J1, and the third end of the positive and negative polarity reversing circuit 2 opposite to the first end is connected to the second connection terminal J2. The diodes in the positive-negative polarity inverting circuit 2 may be connected in reverse. It is sufficient that opposite ends thereof are connected to the first connection terminal J1 and the second connection terminal J2, respectively, and the other opposite ends are connected to the positive input terminal of the power supply chip 3 and the ground, respectively. The positive and negative pole swapping circuit 2 is placed at the front end of the TMR magnetoresistive chip 1, the voltage is firstly subjected to circuit positive and negative regulation through the positive and negative pole swapping circuit 2, and then the voltage input into the TMR magnetoresistive chip 1 is a regulated unique stable voltage value, so that the TMR magnetoresistive chip 1 normally works.
The amplifying circuit 4 comprises a light emitting diode L1, a resistor R1, a fifth diode D5, a first triode T1 and a second triode Q2, wherein the first triode Q1 is NPN type, a base thereof is connected with an output terminal of the power chip 3, an emitter thereof is connected with an output terminal of the TMR magnetoresistive chip 1, one end of the resistor R1 is connected with a second end (a positive input terminal of the power chip 3) of the positive-negative polarity inverting circuit 2, the other end thereof is connected with a positive electrode of the fifth diode D5, a negative electrode of the fifth diode D5 is connected with a positive electrode of the light emitting diode L1, and a negative electrode of the light emitting diode L1 is connected with a collector of the first triode Q1. The second triode Q2 is PNP type, and has a base connected to the anode of the fifth diode D5, a grounded collector, and an emitter connected to the second end of the positive-negative polarity inverting circuit 2 (the positive input end of the power chip 3) to amplify the power.
Besides the indication function, the led L1 has a stable operating voltage of about 1.8V, and when the led L1, the resistor R1, the fifth diode D5 and the first transistor Q1 are turned on, the current through the resistor R1, the fifth diode D5, the led L1 and the first transistor Q1 has a voltage drop of about 2.7V, which provides the operating voltage of the power chip 3 and the filter circuit 5. When the power supply chip 3 works normally, a voltage of 2.5V is supplied to the TMR magnetoresistive chip 1.
The filter circuit 5 is arranged between the power supply chip 3 and the TMR magnetoresistive chip 1, comprises a diode and a capacitor, and plays a role in enabling the power supply chip 3 to output stable voltage after filtering. The filter circuit 5 comprises an eighth diode D8, an electrolytic capacitor C1 and a capacitor C2, wherein the anode and the cathode of the eighth diode D8 are connected to the anode input end of the power chip 3, the anode of the electrolytic capacitor C1 is connected to the anode input end and the cathode of the power chip 3, and the two ends of the capacitor C2 are respectively connected to the output end and the ground of the power chip 3.
The TMR magnetoresistive chip 1, the power chip 3 and the filter circuit 5 form a magnetic induction working circuit, the circuit needs 2.7V or more direct current voltage to work, the power chip 3 is ensured to have stable working voltage, and the power chip 3 is unstable when the voltage is lower than the voltage.
In this embodiment, the TMR magnetoresistive chip 1 outputs a low level when sensing the magnet, and thus the above two triodes are used. When the TMR magnetoresistive chip 1 which outputs a high level in operation is used, the first transistor Q1 is of PNP type, and the second transistor Q2 is of NPN type.
If the first connection terminal J1 is connected to the signal input terminal of the frequency converter, the second connection terminal J2 is connected to the common terminal of the frequency converter. At this time, the first diode D1 in the positive-negative switching circuit 2 is turned on, the second terminal thereof outputs a voltage of about 23.6V (the voltage of the inverter is 24V, which is about 0.4V through the voltage drop of the first diode D1), the positive input terminal of the power chip 3 is connected to the second terminal of the positive-negative switching circuit 2 (the positive voltage is input to the power chip 3), and the negative input terminal is connected to the fourth terminal of the positive-negative switching circuit 2, so that the fourth diode D4 is turned on, the signal input terminal and the common terminal of the inverter are turned on, the power chip 3 starts to operate (the power chip 3 is a high-voltage-resistant chip), and the operating voltage of the TMR magnetoresistive chip 1 is supplied to operate, the current of the whole circuit is about the operating current of the TMR magnetoresistive chip 1 and the power chip 3, so that the amplifying circuit 4 is turned off, and the.
In this case, when the magnet approaches the TMR magnetoresistive chip 1, the low level of the TMR magnetoresistive chip 1 output may make the first transistor Q1 conductive, whereby the light emitting diode L1 and the fifth diode D5 are conductive, thereby making the second transistor Q2 conductive, amplifying the current of the circuit, whereby the inverter can operate normally; when the magnet is far away from the TMR magnetoresistive chip 1, the amplifying circuit 4 is turned off again by the high level output from the TMR magnetoresistive chip 1, and thus the inverter does not operate.
Similarly, if the first connection terminal J1 is connected to the common terminal of the inverter, the second connection terminal J2 is connected to the signal input terminal of the inverter. At this time, the third diode D3 in the positive-negative switching circuit 2 is turned on, the second terminal thereof outputs a voltage of about 23.6V (the voltage of the inverter is 24V, and the voltage drop of about 0.4V is caused by the third diode D3), the positive input terminal of the power chip 3 is connected to the second terminal of the positive-negative switching circuit 2 (the positive voltage is input to the power chip 3), and the negative input terminal is connected to the fourth terminal of the positive-negative switching circuit 2, so that the second diode D2 is turned on, the signal input terminal and the common terminal of the inverter are turned on, the power chip 3 starts to operate (the power chip 3 is a high-voltage-resistant chip), and the operating voltage of the TMR magnetoresistive chip 1 is supplied to operate, the current of the whole circuit is about the operating current of the TMR magnetoresistive chip 1 and the power chip 3, and the amplifier circuit 4 is turned off, and the.
In this case, when the magnet approaches the TMR magnetoresistive chip 1, the low level of the TMR magnetoresistive chip 1 output may make the first transistor Q1 conductive, whereby the light emitting diode L1 and the fifth diode D5 are conductive, thereby making the second transistor Q2 conductive, amplifying the current of the circuit, whereby the inverter can operate normally; when the magnet is far away from the TMR magnetoresistive chip 1, the amplifying circuit 4 is turned off again by the high level output from the TMR magnetoresistive chip 1, and thus the inverter does not operate.
In the working process, although the signal input end and the public end are connected with the switch on the frequency converter, no positive and negative description is made, when the frequency converter is applied to the switch, the multimeter measurement is displayed by positive and negative voltages, so that the two connecting terminals have the difference of the positive and negative ends, and different diodes in the bridge circuit are conducted.
By the circuit, the 2-wire type design of the switch circuit is realized, the two wiring terminals can normally work without distinguishing the positive electrode and the negative electrode, the wiring operation is simpler, only one circuit is needed no matter the circuit of the frequency converter is an NPN type or a PNP type, and only the two wiring terminals are connected with the two ends of the frequency converter, so that the operation is further simplified; besides being suitable for frequency converters with positive and negative terminals, for frequency converters with only one signal input terminal (except the common terminal, the rest are input terminals) and the common terminal, two poles are connected into the common terminal and any one of the input terminals of the NPN and PNP frequency converters, and the frequency converter has better universality regardless of whether the frequency converter is of an NPN or PNP type.
Example two
Referring to fig. 2, the difference between the present embodiment and the first embodiment is that two diodes (a sixth diode D6 and a seventh diode D7) connected in series are used instead of the light emitting diode L1 and are connected in series in the same direction as the fifth diode D5, so that the final voltage drop of the amplifying circuit 4 is 2.7V, and the operating voltage of the power chip 3 is satisfied.
Claims (6)
1. A switch circuit, includes TMR magnetic resistance chip (1), power chip (3) for TMR magnetic resistance chip (1) power supply, and be used for first binding post (J1) and second binding post (J2) be connected with external controller, the negative pole input ground connection of power chip (3), its characterized in that: the power supply circuit is characterized by further comprising a positive and negative electrode switching circuit (2), wherein the positive and negative electrode switching circuit (2) is a bridge circuit with four external connection ends, the four external connection ends are a first end, a second end, a third end and a fourth end respectively, the first end is opposite to the third end, the second end is opposite to the fourth end, the first end is connected to a first wiring terminal (J1), the third end is connected to a second wiring terminal (J2), the second end is connected to the positive input end of the power supply chip (3), and the fourth end is grounded.
2. The switching circuit of claim 1, wherein: the positive-negative pole-changing circuit (2) comprises a first diode (D1), a second diode (D2), a third diode (D3) and a fourth diode (D4), wherein the positive pole of the first diode (D1) is connected with the negative pole of the second diode (D2), and the joint of the positive pole of the first diode (D1) and the negative pole of the second diode (D2) forms the first end; the cathode of the first diode (D1) is connected with the cathode of a third diode (D3), and the second end is formed at the connection position of the cathode of the first diode (D1) and the cathode of the third diode (D3); the anode of the third diode (D3) is connected with the cathode of the fourth diode (D4), and the junction of the anode of the third diode (D3) and the cathode of the fourth diode (D4) forms the third end; the cathode of the fourth diode (D4) is connected with the anode of the second diode (D2), and the junction of the cathode of the fourth diode (D4) and the anode of the second diode (D2) forms the fourth end.
3. The switching circuit according to claim 1 or 2, wherein: the LED driving circuit further comprises an amplifying circuit (4), wherein the amplifying circuit (4) comprises a light emitting diode (L1), a resistor (R1), a fifth diode (D5), a first triode (Q1) and a second triode (Q2), the base electrode of the first triode (Q1) is connected with the output end of the power chip (3), the emitting electrode of the first triode is connected with the output end of the TMR magneto-resistive chip (1), one end of the resistor (R1) is connected with the anode input end of the power chip (3), the other end is connected with the anode of the fifth diode (D5), the cathode of the fifth diode (D5) is connected with the anode of the light-emitting diode (L1), the cathode of the light-emitting diode (L1) is connected with the collector of the first triode (Q1), the base electrode of the second triode (Q2) is connected with the positive electrode of the fifth diode (D5), the collector electrode of the second triode is grounded, and the emitter electrode of the second triode is connected with the positive electrode input end of the power chip (3).
4. The switching circuit according to claim 1 or 2, wherein: the amplifier further comprises an amplifying circuit (4), the amplifying circuit (4) comprises a resistor (R1), a fifth diode (D5), a sixth diode (D6), a seventh diode (D7), a first triode (Q1) and a second triode (Q2), the base of the first triode (Q1) is connected with the output end of the power chip (3), the emitter of the first triode is connected with the output end of the TMR magnetoresistive chip (1), one end of the resistor (R1) is connected with the positive input end of the power chip (3), the other end of the resistor (R1) is connected with the positive electrode of the fifth diode (D5), the fifth diode (D5), the sixth diode (D6) and the seventh diode (D7) are connected in series in the same direction, the negative electrode of the seventh diode (D7) is connected with the collector of the first triode (Q1), the base of the second triode (Q2) is connected with the positive electrode of the fifth diode (D5), and the collector of the second triode (Q5) is connected with the ground, The emitter is connected to the positive input end of the power chip (3).
5. The switching circuit according to claim 1 or 2, wherein: the TMR magnetic resistance chip is characterized by further comprising a filter circuit (5), wherein the filter circuit (5) is arranged between the power supply chip (3) and the TMR magnetic resistance chip (1).
6. The switching circuit of claim 5, wherein: the filter circuit (5) comprises an eighth diode (D8), an electrolytic capacitor (C1) and a capacitor (C2), wherein the anode and the cathode of the eighth diode (D8) are connected to the anode input end of the power chip (3), the anode of the electrolytic capacitor (C1) is connected to the anode input end and the cathode of the power chip (3) and is grounded, and two ends of the capacitor (C2) are respectively connected to the output end and the ground of the power chip (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920806485.1U CN209982461U (en) | 2019-05-30 | 2019-05-30 | Switching circuit |
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| CN201920806485.1U CN209982461U (en) | 2019-05-30 | 2019-05-30 | Switching circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533802A (en) * | 2021-09-17 | 2021-10-22 | 山东昊特自动化仪表有限公司 | Power-on test device for semiconductor manufacturing |
| CN117311242A (en) * | 2023-11-28 | 2023-12-29 | 山东奥卓电气科技发展有限公司 | Control system of switch reluctance controller |
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2019
- 2019-05-30 CN CN201920806485.1U patent/CN209982461U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533802A (en) * | 2021-09-17 | 2021-10-22 | 山东昊特自动化仪表有限公司 | Power-on test device for semiconductor manufacturing |
| CN113533802B (en) * | 2021-09-17 | 2022-01-21 | 山东昊特自动化仪表有限公司 | Power-on test device for semiconductor manufacturing |
| CN117311242A (en) * | 2023-11-28 | 2023-12-29 | 山东奥卓电气科技发展有限公司 | Control system of switch reluctance controller |
| CN117311242B (en) * | 2023-11-28 | 2024-02-09 | 山东奥卓电气科技发展有限公司 | Control system of switch reluctance controller |
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