CN116774098A - Single-path detection circuit, main detection circuit and detection device for motor driver - Google Patents
Single-path detection circuit, main detection circuit and detection device for motor driver Download PDFInfo
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- CN116774098A CN116774098A CN202310605096.3A CN202310605096A CN116774098A CN 116774098 A CN116774098 A CN 116774098A CN 202310605096 A CN202310605096 A CN 202310605096A CN 116774098 A CN116774098 A CN 116774098A
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Abstract
The single-path detection circuit for the motor driver comprises an output wiring unit and a single-path switch unit, wherein the output wiring unit comprises resistors R1 and R2 and an output contact, one end of the resistor R1 is connected with direct-current working voltage, the other end of the resistor R2 is connected with one end of the resistor R2, the output contacts 3 and 4 are respectively connected with pins OUT2 and VDD of a four-pin motor driver element, the output contacts 1 and 2 are grounded and are respectively connected with pins GND and OUT1 of the four-pin motor driver element, the single-path switch unit comprises a resistor R3, a diode D2 and a three-stage tube Q1, the base electrode of the three-stage tube Q1 is electrically connected with the other end of the resistor R2, the emitter of the three-stage tube Q1 is grounded, the collector of the three-stage tube Q1 is respectively connected with one end of the resistor R3 and the anode of the diode D2, the other end of the resistor R3 is connected with direct-current working voltage, and the cathode of the diode D2 is a short-circuit signal output end. The invention has the advantages of convenient maintenance, low cost, reliable and accurate detection and high efficiency.
Description
Technical Field
The invention belongs TO the technical field of production line detection, relates TO improvement of welding quality detection performance of pins of a direct current brushless motor driver element for SIP-4L (TO-94) encapsulation, and particularly relates TO a single-path detection circuit, a main detection circuit and a detection device for a motor driver.
Background
Because of the small pitch of the pins of the DC brushless motor driver element of the SIP-4L (TO-94) package, partial short circuit condition of the continuous welding can occur during the welding on the production line. If the device cannot be detected quickly and reliably, the device is easy to burn out in the subsequent functional test link or when the client is electrified for use, so that equipment failure and even serious associated loss are caused.
In most cases, the use of SIP-4L (TO-94) packaged dc brushless motor driver components is a few component, lower cost, larger lot size and more style circuit board. The existing technical scheme for detecting the pin continuous welding short circuit is not special, and is mainly general technical schemes such as visual inspection, optical inspection, ICT test (integrated circuit test) and even direct FCT test (functional test), and the like, so that the effect is poor, and certain defects exist:
1. the existing ICT test technology needs to occupy an expensive ICT tester, and is difficult to be provided with the ICT tester in a large quantity aiming at the circuit board test with low cost, large batch and multiple styles.
2. Aiming at the technical problem, the conventional ICT test technology needs professional parameter setting, debugging and operation, and is not easy to master by workers.
ICT testing is somewhat slower for larger batches of circuit board tests.
4. Visual detection methods such as visual detection are low in efficiency and detection rate, and easy to miss.
5. Because the H-bridge output circuit is arranged in the direct current brushless driver chip, the MOS tube of a certain bridge arm in the chip working interior is opened by the direct current test method, so that the chip is easily damaged by high current.
Therefore, no matter which pin is used for the welding short circuit detection technology and the tooling, the safety is met in terms of detection requirement, and no matter whether the element to be detected is in the welding short circuit or not can not be damaged when the detection work is needed; secondly, the detection efficiency is better, and the detection technology or the detection device has the advantages of rapidness, convenience and reliability and can be realized at low cost.
Disclosure of Invention
The invention aims to provide a single-path detection circuit, a main detection circuit and a detection device for a motor driver, which are used for solving the defects of insufficient detection quality and insufficient detection effect on pin continuous welding short circuit in the prior art.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
the single-path detection circuit for the motor driver comprises output wiring units and a single-path switch unit, wherein the output wiring units comprise resistors R1 and R2 and output joints 1, 2, 3 and 4, one end of the resistor R1 is connected with direct-current working voltage, the other end of the resistor R1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with direct-current working voltage, output joints 3 and 4 are sequentially arranged on a circuit from the resistor R2 to the resistor R1, the output joints 3 and 4 are respectively electrically connected with pins OUT2 and VDD of a four-pin motor driver element, the output joints 1 and 2 are grounded and are respectively electrically connected with pins GND and OUT1 of the four-pin motor driver element, the single-path switch unit comprises a resistor R3, a diode D2 and a third-stage transistor Q1, a base electrode of the third-stage transistor Q1 is electrically connected with the other end of the resistor R2, an emitter of the third-stage transistor Q1 is grounded, a collector of the third-stage transistor Q1 is respectively connected with one end of the diode D2 anode, the other end of the resistor R3 is connected with direct-current working voltage, a cathode of the diode D2 is a short-circuit signal output end, when the pins of the four-pin motor driver element are respectively connected with pins and the pins are in short circuit, the output joints 1 and 3 and 4 are respectively connected with zero level and D1; when the pins of the four-pin motor driver element are welded normally, a voltage difference exists among the output joints 1, 2, 3 and 4, so that the triode Q1 is conducted, and the diode D2 is cut off.
In order to further achieve the purpose of the present invention, the following technical solutions may also be adopted:
in the single-path detection circuit for the motor driver, the low-voltage differential type light emitting diode D1 is connected in series between the output joints 2 and 3, and the light emitting diode D1 is used for giving out a luminous prompt when the output joints are abnormally connected with the pins of the four-pin motor driver element.
In the single-path detection circuit for a motor driver, the dc operating voltage is 12V, and the resistor R1 is an adjustable resistor.
The main detection circuit comprises the single-path detection circuit, a main switch unit and a prompt unit, wherein the main switch unit comprises a resistor R4, a triode Q2 and a triode Q3, one end of the resistor R4 is connected with direct-current working voltage, the other end of the resistor R4 is connected with a collector electrode of the triode Q2 and a base electrode of the triode Q3, the base electrode of the triode Q2 is connected with a short-circuit signal output end of the diode D2, the collector electrode of the triode Q3 is connected with the prompt unit, and emitter electrodes of the triodes Q2 and Q3 are grounded.
The main detection circuit for the motor driver comprises a resistor R5 and a buzzer, wherein two ends of the resistor R5 are respectively connected with direct-current working voltage and one end of the buzzer, and the other end of the buzzer is connected with a collector electrode of a triode Q3; an adjustable resistor RC1 for eliminating the false response of the buzzer is connected between the base electrode and the emitter electrode of the transistor Q3.
The main detection circuit for the motor driver is characterized in that the prompting unit is composed of a resistor R6 and a light emitting diode LED1, two ends of the resistor R6 are respectively connected with direct current working voltage and an anode of the light emitting diode LED1, and a cathode of the light emitting diode LED1 is connected with a collector of a triode Q3.
The main detection circuit for the motor driver is provided with a plurality of sets of single-way detection circuits, and the short-circuit signal output ends of the diodes D2 in the plurality of sets of single-way detection circuits are electrically connected with the base electrode of the triode Q2 of the main switch circuit.
The detection device for the motor driver comprises a power supply module, a main detection module and a tool fixture, wherein the main detection module is provided with the main detection circuit, the power supply module provides direct-current working voltage for the main detection circuit, the tool fixture is provided with a needle bed of a workpiece to be detected, and a needle bed probe is electrically connected with an output contact point of the single-path detection circuit through a wire harness.
As described above, the detection device for the motor driver is characterized in that the fixture is provided with the indicator lamp, the indicator lamp is the light emitting diode LED2, the anode and the cathode of the light emitting diode LED2 are respectively electrically connected with one end of the resistor R7 and the collector of the three-stage tube Q3 on the main detection circuit through wires, and the other end of the resistor R7 is connected with the direct current working voltage.
The detection device for the motor driver is characterized in that the main detection module is a PCB (printed circuit board) and 2-12 sets of single-path detection circuits are arranged on the PCB.
Compared with the prior art, the invention has the advantages that:
the circuit has reasonable logic, simplicity, high efficiency, convenient maintenance and high test speed. In addition, proper elements and parameter settings are adopted, so that the components of the board to be detected are not burnt out during detection, and the safety and the high efficiency of detection can be realized.
The invention can detect multiple sets of four-leg motor driver elements at the same time, has low cost, is suitable for multiple sets of configuration, and is convenient to operate and use. The single-path detection circuit and the main detection circuit only use electronic elements such as resistors, diodes, triodes, light-emitting diodes and the like, and do not adopt logic chips, analog chips and singlechip schemes, so that the detection and judgment are accurate and reliable, and the efficiency is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is an electrical schematic diagram of a main detection circuit according to the present invention;
FIG. 2 is a schematic diagram of the connection of the main detection circuit to the pins of the four-pin motor driver element according to the present invention;
FIG. 3 is an electrical schematic diagram of a single-pass detection circuit according to the present invention (second set shown);
FIG. 4 is a schematic block diagram of a detection device according to the present invention;
fig. 5 is a detection flow chart of the detection device according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
In the description of the embodiments of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly, and those skilled in the art may reasonably ascertain the specific meaning of the terms in the present invention by combining the specific contents of the technical solutions.
In this embodiment, the motor driver element and the motor driver chip are referred TO as a direct current brushless motor driver element packaged by SIP-4L (TO-94). The side boards to be side boards, panels to be joined, referred to in fig. 5, refer to circuit boards on which motor driver elements are mounted.
As shown in fig. 1-2, the single-path detection circuit for a motor driver disclosed in this embodiment is composed of an output wiring unit and a single-path switch unit, wherein the output wiring unit is used for being connected with a pin of a dc brushless motor driver element packaged by SIP-4L (T0-94), detecting whether a short circuit condition exists in the pin, and correspondingly turning on or off the single-path switch unit to output a high-level signal.
The output wiring unit comprises resistors R1 and R2, one end of the resistor R1 is connected with direct-current working voltage, the other end of the resistor R1 is connected with one end of the resistor R2, output contacts 3 and 4 are sequentially arranged on a circuit from the resistor R2 to the resistor R1, the output contacts 1 and 2 are grounded and are respectively used for being electrically connected with pins GND and OUT1 of the four-pin motor driver element, and the output contacts 3 and 4 are respectively used for being electrically connected with pins OUT2 and VDD of the four-pin motor driver element.
The single-way switch unit comprises a resistor R3, a diode D2 and a third-stage tube Q1, wherein the base electrode of the third-stage tube Q1 is connected with the other end of the resistor R2, the emitter electrode of the third-stage tube Q1 is grounded, the collector electrode of the third-stage tube Q1 is respectively connected with one end of the resistor R3 and the anode of the diode D2, the other end of the resistor R3 is connected with direct-current working voltage, and the cathode of the diode D2 is a short-circuit signal output end.
When the pins of the motor driver element are in short circuit in welding, the voltage difference among the output joints 1, 2, 3 and 4 is zero, so that the triode Q1 is turned off, and the diode D2 is turned on to output high level; when the motor driver element pin is welded normally, a voltage difference exists between the output joints 1, 2 and 3, 4, so that the triode Q1 is conducted, and the diode D2 is cut off.
The single-path detection circuit is used for detecting the pin joint welding short circuit working principle of the motor driver element and is described as follows:
based on the soldering operation and the actual situation of the pin arrangement, if four pins of the direct current brushless motor driver element of the SIP-4L (TO-94) package are soldered, the two adjacent pins must be soldered. Therefore, it is not necessary to check whether the 1 and 3 pins, 2 and 4 pins are soldered. Thus, as shown in fig. 2, the detection of the connection welding condition between four pins is simplified into: let 1, 3 pin connect the same high level of detection signal, let 2, 4 pin connect the same low level of detection signal. If there is a short circuit condition, the differential pressure between pins 1 and 3 and pins 2 and 4 of the motor driver element to be tested will be reduced to zero, otherwise the differential pressure is not zero.
The current is limited by configuring the resistance value of the resistor R1-1 in the output wiring unit, so that the differential pressure between the pins 1 and 3 and the pins 2 and 4 is about 1V when no continuous welding short circuit is realized, and the differential pressure is controlled between 0.9V and 1.2V reasonably. In addition, the resistor R1-1 may be different for different manufacturers and different types of motor driver chips.
When no continuous welding short circuit exists, the voltage difference is larger than the turn-on voltage of NPN triode (about 0.7V of silicon triode) to drive the following triode Q1-1 to turn on, the collector voltage of the triode Q1-1 is pulled down, as shown in figure 1, the collector voltage of all the triodes Q1 is pulled down in the main detection circuit, and each diode D2 at the back is cut off.
With continued reference to fig. 1 and 2, in this embodiment, a low-dropout led D1 is connected in series between the output contacts 2 and 3 of the output connection unit, and the led D1 is used for emitting a light prompt when the output contacts are abnormally connected with the pins of the four-pin motor driver element. The LED D1 can be selected to package red LEDs of 0805 or more as required, and the red light indicates that abnormal connection exists between the output contact and the motor starter pin. So that the operator can maintain according to the prompt.
In this embodiment, the power module provides a 12V dc operating voltage, and in addition, the resistor R1 may be set as an adjustable resistor to facilitate voltage difference adjustment of the output connection point of the output wiring unit.
To match the detection of multiple four-pin motor driver elements, multiple sets of single-path detection circuits are correspondingly arranged. The single pass detection circuit output contacts are connected to the four pin motor driver element pins as described above. The second set of single-pass detection circuits, as shown in fig. 3, is identical to the first set of single-pass detection circuits in connection, principle and signal processing.
With continued reference to fig. 1, the present embodiment discloses a main detection circuit for a motor driver, which includes a single-path detection circuit, a main switch unit, and a prompt unit. The main switch unit is connected with the short-circuit signal output end of the diode D2 in the single-path detection circuit, and controls the prompting unit to work for sound and light alarm indication according to whether the detected pin of the motor driver element has a continuous welding short-circuit condition.
The main switch unit comprises a resistor R4 and three transistors Q2 and Q3, one end of the resistor R4 is connected with direct-current working voltage, the other end of the resistor R4 is connected with a collector electrode of the transistor Q2 and a base electrode of the transistor Q3, the base electrode of the transistor Q2 is connected with a short-circuit signal output end of the diode D2, the collector electrode of the transistor Q3 is connected with a prompt unit, and emitter electrodes of the three transistors Q2 and Q3 are grounded.
The sound prompting unit consists of a resistor R5 and a buzzer, wherein two ends of the resistor R5 are respectively connected with direct-current working voltage and one end of the buzzer, and the other end of the buzzer is connected with the collector electrode of the three-stage tube Q3.
The false response of the buzzer at the moment of the electricity can be eliminated by the resistance or the capacitance of the adjustable resistor RC1 (10K or 0.1 uF). The adjustable resistor RC1 of this embodiment is connected in series between the base and emitter of the transistor Q3.
The light prompting unit consists of a resistor R6 and a light emitting diode LED1, wherein two ends of the resistor R6 are respectively connected with direct current working voltage and the anode of the light emitting diode LED1, and the cathode of the light emitting diode LED1 is connected with the collector of a triode Q3.
In addition, when the main detection circuit is provided with a plurality of sets of single-path detection circuits for detecting a plurality of four-pin motor driver elements, the short-circuit signal output ends of the diodes D2 in the plurality of sets of single-path detection circuits are electrically connected with the base electrode of the triode Q2 of the main switch circuit.
When the triode Q2 is turned off, the collector voltage of the Q2 is set high, so that the triode Q3 is turned on, the buzzer starts to alarm, the light emitting diode LED1 emits green light, and the external light emitting diode LED2 is also lightened simultaneously.
When one or more pins of the motor driver element are in a continuous welding short circuit, the voltage difference between the tested element 1, 3 pins and the pins 2 and 4 is reduced to zero, the corresponding triode Q1 on the single-path detection circuit is turned off, the collector voltage of the triode Q1 is set high, the diode D2 connected at the rear is forward biased and conducted, the diodes D2 at the detection subcircuit area corresponding to other single boards without the continuous welding short circuit are reversely biased and cut off, the diodes D2 are gathered and output high level, the triode Q2 is turned on, the collector voltage of the triode Q2 is pulled low, so that the triode Q3 is turned off, the buzzer cannot sound, and the light emitting diode LED1 does not work.
In addition, if the output contact of a single-path detection circuit is not connected or only 1, 2 pins or 3, 4 pins are communicated with the corresponding test points of the board to be tested, the LED D1 in the single-path detection circuit is lightened to assist in reminding maintenance or correction. Since the diode D2 is configured in each set of single-path detection circuit for isolation, the output contact of the set of single-path detection circuits is not connected for use, and the detection function of other sets of single-path detection circuits is not affected.
As shown in fig. 4, this embodiment discloses a detection device for a motor driver, the detection device includes a power module, a main detection module, a fixture, a main detection circuit is installed on the main detection module, the power module provides direct current working voltage for the main detection circuit, the fixture has a needle bed matched with a workpiece to be detected, and a needle bed probe is electrically connected with an output contact of a single-path detection circuit through a wire harness. The workpiece to be measured is a board to be measured on which a motor driver element is mounted.
In order to facilitate observation, an indicator lamp is arranged on the fixture, the indicator lamp is a light-emitting diode (LED) 2, the anode and the cathode of the LED2 are respectively electrically connected with one end of a resistor R7 and the collector of a triode Q3 on a main detection circuit through wires, and the other end of the resistor R7 is connected with direct-current working voltage.
The main detection module of this embodiment is a PCB board, and 2-12 sets of single-path detection circuits are arranged on the PCB. Therefore, the main detection module can be arranged through the PCB, the setting of a plurality of sets of single-way detection circuits and the fixture is facilitated, and the plurality of sets of single-way detection circuits and the fixture needle bed probe connection can be carried out through the PCB wiring, so that the cost is reduced, and the quality and the detection performance of the circuit connection are ensured.
The second set of single-pass detection circuits, as shown in fig. 3, is identical to the first and second sets of single-pass detection circuits in connection, principle and signal processing procedures as well as the other 3-12 sets of single-pass detection circuits.
As shown in fig. 1 and 2, when in detection, the light emitting diode D1 is an indication lamp which is not normally connected to the output contact, the light emitting diode LED1 is a detection passing indication lamp arranged on the main detection module, that is, all detected motor driver element pins have no short circuit defect due to continuous welding, the LED2 is a detection passing indication lamp which needs to be externally connected by a wire, and the BZ1 is a detection passing prompt buzzer.
If the LED D1 is used for alarming and connecting bad, the resistance values of the resistors R1-1 to R1-12 are required to be adjusted according to the Hall types of different motor driver chips, and the voltage at two ends of the red light is kept at about 1V under the normal test condition within the range of 4.7K to 10K, and is better at 0.9V to 1.2V generally, so that false alarm of the red light is prevented. The light emitting diode D1 can be covered or removed without using this function.
With continued reference to fig. 2 and 4, the output contacts of each single-path detection circuit are connected with the pins of the motor driver element on the board to be tested through a wire harness and a probe, and the sequence is as follows: output contacts 1, 2 are for electrical connection with four-pin motor driver element pins GND, OUT1, respectively, and output contacts 3, 4 are for electrical connection with four-pin motor driver element pins OUT2, VDD, respectively.
As shown in fig. 5, when the power module of the detection device of the present invention is connected to ac mains, the power module outputs 12V dc operating voltage. And placing the plate to be tested into the needle bed of the tool in the correct direction, and pressing the tool clamp to enable the test probes of the needle bed to tightly press the corresponding test points of the plate to be tested.
The test button is pressed, and the direct-current working voltage starts to supply power to the main detection module. The main detection module outputs detection signals to detect each motor driver element of the board to be detected through each output contact and the wire harness on the PCB. If the pins of each motor driver element of the board to be tested are not in a continuous welding short circuit, the buzzer of the main detection module sounds to remind, and meanwhile, the LED1 indicator lamp is lightened to represent that the test is passed. If a pin of a motor driver element in the board to be tested has a continuous welding short circuit condition, a buzzer of the main detection module does not sound to remind, and the Light Emitting Diode (LED) 1 is not lightened, which means that the test fails. And after the result is measured, the test button is loosened to stop detection, and then the tool clamp is loosened to replace the next board to be measured.
In the single-path detection circuit, if the resistance value of the resistor R1-2 is not reasonably configured, the upper bridge arm and the lower bridge arm of the same-side half bridge are easily opened simultaneously due to the opening of the inner bridge arm of the motor driver element or abnormal opening of the same-side half bridge, so that an excessive current is formed to burn out the motor driver chip circuit, or the voltage between pins of the motor driver element is lower than 0.7V under the condition of no continuous welding short circuit, and the triode Q1 cannot be started, so that continuous welding and non-continuous welding cannot be judged. The resistances of the other single-path detection circuits at the positions, such as the resistors R1-1 and R1-3, act and the resistance value is required to be the same as that of the resistor R1-2.
The main detection circuit and the detection device only relate to electronic elements such as a resistor, a diode, a triode, a light-emitting diode and the like, and alarm prompt is carried out by utilizing a buzzer, so that detection and judgment of the pin continuous welding short circuit of the motor driver element are realized without a logic chip, an analog chip and a singlechip. The corresponding circuit is simple, the cost is low, a plurality of sets of simultaneous detection and test are suitable to be configured, and the test speed is high; convenient operation and maintenance.
The technical content that is not described in detail in the invention is known in the prior art.
Claims (10)
1. The single-path detection circuit for the motor driver is characterized by comprising an output wiring unit and a single-path switch unit, wherein the output wiring unit comprises resistors R1 and R2 and output contacts 1-4, one end of the resistor R1 is connected with direct-current working voltage, the other end of the resistor R1 is connected with one end of the resistor R2, output contacts 3 and 4 are sequentially arranged on a circuit from the resistor R2 to the resistor R1, the output contacts 3 and 4 are respectively connected with pins OUT2 and VDD of the four-pin motor driver element, the output contacts 1 and 2 are grounded and respectively connected with pins GND and OUT1 of the four-pin motor driver element, the single-path switch unit comprises a resistor R3, a diode D2 and a third-stage transistor Q1, the base electrode of the third-stage transistor Q1 is electrically connected with the other end of the resistor R2, the emitter of the third-stage transistor Q1 is grounded, the collector electrode of the third-stage transistor Q1 is respectively connected with one end of the resistor R3 and the anode of the diode D2, the other end of the resistor R3 is connected with direct-current working voltage, the cathode of the diode D2 is a short-circuit signal output end, and when the pins of the four-pin motor driver element are connected with pins to be in short circuit, the output contacts 1, 2 and 3 and 4 are respectively connected with pins GND and D1 and 3 are high, and the voltage level is turned off; when the pins of the four-pin motor driver element are welded normally, a voltage difference exists among the output joints 1, 2, 3 and 4, so that the triode Q1 is conducted, and the diode D2 is cut off.
2. The single-pass detection circuit for motor driver according to claim 1, wherein a low-voltage differential LED D1 is connected in series between the output contacts 2 and 3, and the LED D1 is used for emitting light when the output contacts are abnormally connected with the pins of the four-pin motor driver element.
3. The single-pass detection circuit for a motor driver according to claim 1, wherein the dc operation voltage is 12V, and the resistor R1 is an adjustable resistor.
4. The main detection circuit for the motor driver is characterized by comprising the single-path detection circuit, a main switch unit and a prompt unit according to any one of claims 1-3, wherein the main switch unit comprises a resistor R4, three-stage transistors Q2 and Q3, one end of the resistor R4 is connected with direct-current working voltage, the other end of the resistor R4 is connected with a collector electrode of the three-stage transistor Q2 and a base electrode of the three-stage transistor Q3, the base electrode of the three-stage transistor Q2 is connected with a short-circuit signal output end of the diode D2, the collector electrode of the three-stage transistor Q3 is connected with the prompt unit, and emitter electrodes of the three-stage transistors Q2 and Q3 are grounded.
5. The main detection circuit for motor driver according to claim 4, wherein the prompting unit is composed of a resistor R5 and a buzzer, wherein two ends of the resistor R5 are respectively connected with a direct current working voltage and one end of the buzzer, and the other end of the buzzer is connected with a collector of the triode Q3; an adjustable resistor RC1 for eliminating the false response of the buzzer is connected between the base electrode and the emitter electrode of the transistor Q3.
6. The main detection circuit for motor driver according to claim 4, wherein the prompting unit is composed of a resistor R6 and a light emitting diode LED1, wherein two ends of the resistor R6 are respectively connected with the dc operating voltage and the anode of the light emitting diode LED1, and the cathode of the light emitting diode LED1 is connected with the collector of the transistor Q3.
7. The main detection circuit for motor driver according to claim 4, wherein the main detection circuit has a plurality of sets of single-path detection circuits, and the short-circuit signal output ends of the diodes D2 in the plurality of sets of single-path detection circuits are electrically connected with the base electrode of the transistor Q2 of the main switch circuit.
8. The detection device for the motor driver is characterized by comprising a power supply module, a main detection module and a fixture, wherein the main detection module is provided with the main detection circuit as claimed in any one of claims 4-7, the power supply module provides direct-current working voltage for the main detection circuit, the fixture is provided with a needle bed of a workpiece to be detected, and a needle bed probe is electrically connected with an output contact point of the single-path detection circuit through a wire harness.
9. The detecting device for motor drivers according to claim 8, wherein the fixture is provided with an indicator lamp, the indicator lamp is a light emitting diode LED2, the anode and the cathode of the light emitting diode LED2 are respectively electrically connected with one end of a resistor R7 and a collector of a three-stage tube Q3 on the main detecting circuit through wires, and the other end of the resistor R7 is connected with the direct current working voltage.
10. The detecting device for motor driver according to claim 8, wherein the main detecting module is a PCB board, and 2-12 sets of single-path detecting circuits are provided on the PCB board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310605096.3A CN116774098A (en) | 2023-05-25 | 2023-05-25 | Single-path detection circuit, main detection circuit and detection device for motor driver |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310605096.3A CN116774098A (en) | 2023-05-25 | 2023-05-25 | Single-path detection circuit, main detection circuit and detection device for motor driver |
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| CN116774098A true CN116774098A (en) | 2023-09-19 |
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| CN202310605096.3A Pending CN116774098A (en) | 2023-05-25 | 2023-05-25 | Single-path detection circuit, main detection circuit and detection device for motor driver |
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| Country | Link |
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| CN (1) | CN116774098A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928909A (en) * | 2014-02-28 | 2014-07-16 | 深圳市伟创电气有限公司 | Quick and reliable short-circuit protection method and circuit of switch power supply |
| CN203772995U (en) * | 2014-01-15 | 2014-08-13 | 深圳创维数字技术股份有限公司 | Interface short-circuit detector |
| CN204649920U (en) * | 2015-05-26 | 2015-09-16 | 国家电网公司 | Logic pen circuit module |
| CN214757022U (en) * | 2021-06-10 | 2021-11-16 | 珠海市圣昌电子有限公司 | LED power output multi-path short-circuit protection circuit |
| CN215498237U (en) * | 2021-04-13 | 2022-01-11 | 深圳创维－Rgb电子有限公司 | Mainboard voltage overvoltage protection circuit and device |
-
2023
- 2023-05-25 CN CN202310605096.3A patent/CN116774098A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203772995U (en) * | 2014-01-15 | 2014-08-13 | 深圳创维数字技术股份有限公司 | Interface short-circuit detector |
| CN103928909A (en) * | 2014-02-28 | 2014-07-16 | 深圳市伟创电气有限公司 | Quick and reliable short-circuit protection method and circuit of switch power supply |
| CN204649920U (en) * | 2015-05-26 | 2015-09-16 | 国家电网公司 | Logic pen circuit module |
| CN215498237U (en) * | 2021-04-13 | 2022-01-11 | 深圳创维－Rgb电子有限公司 | Mainboard voltage overvoltage protection circuit and device |
| CN214757022U (en) * | 2021-06-10 | 2021-11-16 | 珠海市圣昌电子有限公司 | LED power output multi-path short-circuit protection circuit |
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