OC circuit on industrial servo driver

Abstract

The utility model relates to an OC circuit on an industrial servo driver, comprising three-phase AC input signal terminals including a first input terminal, a second input terminal and a third input terminal; the diode assembly is used for converting a three-phase alternating-current input signal into a direct-current signal and comprises a first diode, a second diode and a third diode, and the input ends of the first diode, the second diode and the third diode are connected with the first input end, the second input end and the third input end respectively; the output ends of the first diode, the second diode and the third diode are divided into a high-level branch and a low-level branch; and the resistor assembly comprises a first resistor and a second resistor which are respectively connected to the high-level branch and the low-level branch and are used for stabilizing the output voltage. According to the utility model, through reasonable circuit design, a three-phase AC signal is effectively converted into a DC signal, the circuit complexity is reduced, and the reliability of the system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to OC circuit technical field especially relates to an OC circuit on industrial servo driver. BACKGROUND

[0002] With the continuous development of industrial automation technology, servo driver as the key executor is widely used in machinery, automation production line, robot and various high-precision control systems. The main function of servo driver is to control the movement of motor, and current protection circuit is designed in servo driver, wherein OC (Over Current) circuit is an important protection function. OC circuit is mainly used for detecting current anomaly and protecting servo driver from damage in the case of current overload, and its working principle is to convert input three-phase alternating current signal into direct current signal and detect and limit overcurrent through appropriate current shunt path. When input current exceeds the predetermined range, OC circuit triggers protection mechanism to prevent high current from causing damage to driver and motor.

[0003] However, the OC circuit design in the prior art still has some obvious defects. The existing process of converting three-phase alternating current signal into direct current signal usually relies on multiple elements for signal rectification and filtering. For example, multiple bridge rectifiers or complex three-phase power converters are used, which not only increases the complexity of the circuit, but also leads to high manufacturing cost and debugging difficulty. Complex circuit design often requires a large number of precision components, increasing the instability of the system, and is prone to failure due to component aging or poor connection. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an OC circuit on industrial servo driver to solve the above problems.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The present application provides an OC circuit on industrial servo driver, comprising:

[0007] Three-phase alternating current input signal end, including first input end, second input end and third input end;

[0008] Diode assembly for converting three-phase alternating current input signal into direct current signal, the diode assembly includes first diode, second diode and third diode, the input end of first diode, second diode and third diode is connected with first input end, second input end and third input end respectively, and the output end of first diode, second diode and third diode is shunted into high level branch and low level branch;

[0009] The resistance assembly comprises a first resistance and a second resistance, which are connected to the high-level branch and the low-level branch respectively, and are used for stabilizing the output voltage.

[0010] Further, the first diode, the second diode and the third diode respectively comprise a forward diode and a reverse diode, the anode of the forward diode is connected with the three-phase alternating current input signal end, and the cathode is connected with the high-level branch; the cathode of the reverse diode is connected with the three-phase alternating current input signal end, and the anode is connected with the low-level branch.

[0011] Further, the first resistance is a pull-down resistance, the second resistance is a pull-up resistance, the first resistance and the second resistance are arranged on the high-level branch and the low-level branch respectively, the input end of the first resistance is connected with the cathode of the forward diode, and the input end of the second resistance is connected with the anode of the reverse diode.

[0012] Further, the resistance assembly further comprises a third resistance, the third resistance is arranged between the forward diode and the first resistance, and is used for limiting the voltage value passing through the high-level branch.

[0013] Further, the resistance assembly further comprises a fourth resistance, the fourth resistance is arranged between the reverse diode and the second resistance, and is used for limiting the voltage value passing through the low-level branch.

[0014] Further, a first capacitor is further arranged, the first capacitor is connected with the first resistance, and is used for filtering high-frequency noise on the high-level branch.

[0015] Further, a second capacitor is further arranged, the second capacitor is connected with the second resistance, and is used for filtering high-frequency noise on the low-level branch.

[0016] Further, the model of the first diode, the second diode and the third diode is BAV99.

[0017] Further, a grounding port is further arranged, the grounding port comprises a first grounding end and a second grounding end, the first grounding end is arranged on the high-level branch, the second grounding end is arranged on the low-level branch, and is used for connecting the high-level branch and the low-level branch with a ground wire.

[0018] Further, a control chip is further arranged, the control chip is connected with the high-level branch and the low-level branch.

[0019] Compared with the prior art, the utility model has the advantages of the following:

[0020] The application converts three-phase alternating current signals into direct current signals by arranging bidirectional diodes at each phase of the three-phase alternating current input signal end, and divides the output end into high level and low level branches, and cooperates with the resistor assembly to stabilize the output voltage, greatly reduces the circuit complexity, and improves the reliability of the system. Due to the simple structure, fewer circuit failure points, reduced maintenance and maintenance requirements, and improved overall stability of the servo driver, the demand for additional components is greatly reduced, thereby reducing the production cost of the system. At the same time, the simplified design also reduces the time consumption in the process of circuit debugging and production, and further improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained on the basis of these drawings without creative labor.

[0022] The structure, proportion, size, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose of the present application, should still fall within the scope of the technical content disclosed by the present application.

[0023] Figure 1 The structure of the OC circuit on the industrial servo driver in the embodiment is shown in the figure.

[0024] R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; C1, first capacitor; C2, second capacitor; D1, first diode; D2, second diode; D3, third diode; IU, first input end; IV, second input end; IW, third input end; OC_H, high level branch; OC_L, low level branch DETAILED DESCRIPTION

[0025] In order to make the utility model purposes, features, advantages of the present application more obvious and easy to understand, the following will combine the drawings in the embodiment of the present application to clearly and completely describe the technical solutions in the embodiment of the present application. Obviously, the following described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0026] In the description of the utility model, it is understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0027] The technical scheme of the utility model is further illustrated below in combination with the drawings and through specific embodiments.

[0028] Referring to Figure 1 The industrial servo driver disclosed in the embodiment comprises an OC circuit, which comprises:

[0029] A three-phase alternating current input signal end comprises a first input end IU, a second input end IV and a third input end IW.

[0030] A diode assembly is used to convert the three-phase alternating current input signal into a direct current signal, and comprises a first diode D1, a second diode D2 and a third diode D3. The input ends of the first diode D1, the second diode D2 and the third diode D3 are connected to the first input end IU, the second input end IV and the third input end IW respectively. The output ends of the first diode D1, the second diode D2 and the third diode D3 are shunted into a high-level branch OC_H and a low-level branch OC_L.

[0031] A resistance assembly comprises a first resistance R1 and a second resistance R2, which are connected to the high-level branch OC_H and the low-level branch OC_L respectively, and is used to stabilize the output voltage.

[0032] In the embodiment, the diode is preferably an LBAV99LT1G diode, and the three-phase alternating current input signal end is composed of three input ends, namely a first input end IU, a second input end IV and a third input end IW, which receive signals from a three-phase alternating current power supply. The diode assembly is composed of three diodes (a first diode D1, a second diode D2 and a third diode D3), which convert the input three-phase alternating current signal into a pulsating direct current signal. The input end of each diode is connected to the corresponding three-phase input signal end, and the output end is divided into a high-level branch OC_H and a low-level branch OC_L. The resistance assembly includes a first resistance R1 and a second resistance R2, which are connected to the high-level branch OC_H and the low-level branch OC_L, respectively, for stabilizing the voltage output by the circuit, suppressing signal fluctuations and ensuring the stability of the output direct current voltage. The principle of the embodiment is as follows: in a three-phase alternating current system, the three-phase signals are represented as IU, IV and IW, and there is a 120° phase difference between them. Under normal circumstances, the voltage of the three-phase signal changes periodically, and the direction and amplitude of the voltage present a sinusoidal waveform over time. Specifically, the voltage waveforms of IU, IV and IW change in sequence within each period, and the current flows in a cycle from positive to negative within the period. At any time, one of the three signals will be the maximum value (positive), one will be the minimum value (negative), and one will be zero. Each diode contains a forward diode and a reverse diode, and has a bidirectional conduction characteristic. The input end of each diode is connected to three different three-phase input signal ends (IU, IV and IW), and the output end is divided into two branches: a high-level branch OC_H and a low-level branch OC_L. When the voltage direction of the three-phase alternating current input signal meets the conduction condition of a certain diode (e.g., the signal voltage is positive), the diode will conduct and convert the input alternating current signal into a pulsating direct current signal. Due to the bidirectional conduction characteristic of the diode, when the direction of the alternating current changes, the corresponding diode will conduct in the reverse direction, maintaining the stability of the direct current voltage. This effectively converts the alternating current signal into a direct current pulse. Specifically, under the periodic change of the three-phase input signal (e.g., IU, IV and IW), the three diodes conduct alternately, so that the output end (the port connected to the resistance assembly) always maintains a pulsating direct current signal. The resistance assembly includes a first resistance R1 and a second resistance R2, which are connected to the high-level branch OC_H and the low-level branch OC_L of the diode assembly, respectively, to stabilize the output voltage and ensure that the converted direct current signal is not unstable due to transient fluctuations. Specifically, the first resistance R1 is connected to the high-level branch OC_H, and when the voltage of the output signal rises, the first resistance R1 limits the current to prevent the voltage at the output end from being too high and affecting the stability of the circuit. The second resistance R2 is connected to the low-level branch OC_L, and when the voltage of the output signal decreases, the second resistance R2 helps to stabilize the voltage within a reasonable range, ensuring that the output signal does not fluctuate dramatically due to changes in the load.Through the resistance configuration, the circuit can smooth the output DC signal, reduce the pulsation in the AC waveform conversion process, and thus ensure the stability of the DC voltage.

[0033] In one embodiment, the three-phase input signal: input end respectively receives signals (IU, IV, IW) from three-phase AC power supply, each signal has a phase difference of 120°. The signal waveform changes according to the sine wave rule. When the voltage of a certain input signal is positive, the corresponding diode starts to conduct, and the current flows through the diode to the output end. Due to the bidirectional characteristic of the diode, when the input signal voltage is negative, the reverse diode of the diode will conduct, and the signal conversion will continue. The three diodes are alternately turned on, and the output end forms a pulsed DC signal. At this time, although the DC signal has pulsation, it is roughly maintained around a certain average value. Through the voltage division effect of the first resistor R1 and the second resistor R2, the high-frequency fluctuation is suppressed, and the output DC signal is smoothed, and finally a stable DC voltage is output.

[0034] In one embodiment, the first diode D1, the second diode D2 and the third diode D3 respectively include a forward diode and a negative diode, the anode of the forward diode is connected with the three-phase AC input signal end, and the cathode is connected with the high-level branch; the cathode of the negative diode is connected with the three-phase AC input signal end, and the anode is connected with the low-level branch.

[0035] In this embodiment, reference is made to Figure 1, the first diode D1, the second diode D2 and the third diode D3 each include three pins, the first pin corresponds to the anode of the reverse diode, the second pin corresponds to the cathode of the forward diode, and the third pin corresponds to the anode of the forward diode and the cathode of the negative diode. This design allows each diode to conduct in both positive and negative half cycles of the AC input signal, thereby achieving efficient rectification of AC signals to DC signals during conversion, and guiding current through different branches to maintain the stability of the output signal. The first diode D1, the second diode D2 and the third diode D3 are each composed of a forward diode and a negative diode, the high-level branch is connected to the negative electrode of the forward diode for guiding the current through the forward diode, and the low-level branch is connected to the anode of the negative diode for guiding the current through the negative diode. Through the above configuration, the diode converts the three-phase AC signal into a pulsating DC signal. The principle of the embodiment is that the forward diode and the negative diode can work in different AC input signal stages to ensure the stability of the output signal. Specifically, each diode includes a forward diode and a negative diode, and the current path between the forward diode and the negative diode is opposite, which enables the circuit to adapt to the periodic changes of the AC signal. During the positive half cycle of the three-phase AC input signal, the forward diode is turned on. At this time, the anode of the three-phase signal is connected to the anode of the forward diode, and the current flows from the negative electrode of the forward diode to the high-level branch. When the three-phase AC signal enters the negative half cycle, the negative diode is turned on, and the anode of the negative diode is connected to the three-phase AC input signal end, and the cathode is connected to the low-level branch. At this time, the negative diode is turned on, and the current flows from the cathode of the negative diode to the low-level branch. The high-level branch is connected to the negative electrode of each forward diode for guiding the current through the forward diode, and the direction of these currents is consistent with the positive half cycle of the AC signal, so that the current signal received by this branch is a forward current. The low-level branch is connected to the anode of each negative diode for guiding the current through the negative diode, and in the negative half cycle of the AC signal, the negative diode is turned on, and the current flows through the low-level branch, thereby ensuring that the current always has a stable guiding path. Through the above alternating work of the forward and negative diodes, the circuit can effectively rectify the three-phase AC signal to a pulsating DC signal. Since the three-phase AC signal has periodic changes, a pulsating DC signal will be obtained during rectification.

[0036] In one scenario embodiment, assume that the IU terminal (the first input terminal IU) accepts an alternating current (AC) signal with positive and negative alternation, which periodically changes between positive and negative values. When the voltage at the IU terminal is positive (e.g., +5V), current can flow through the diode, and the forward diode in the first diode D1 allows current to flow in the positive half cycle (the positive part of the AC signal), with the diode forward conducting, and the current flowing from the input terminal to the load. When the voltage at the IU terminal is negative (e.g., -5V), the reverse diode in the first diode D1 conducts, allowing current to flow in the reverse direction from the load, so that in the negative half cycle, the current flows in the same direction as in the positive half cycle, i.e., from the negative power terminal or ground potential to the IU terminal.

[0037] In another embodiment, by using a forward diode and a reverse diode in anti-parallel, a three-phase AC signal can be efficiently converted into a direct current signal. Specifically, in the positive half cycle of the AC signal, the forward diode conducts, directing current to the high-level branch; and in the negative half cycle, the reverse diode conducts, directing current to the low-level branch. In this way, the three-phase AC signal is effectively rectified into a pulsating direct current signal.

[0038] In one embodiment, the first resistor R1 is a pull-down resistor, and the second resistor R2 is a pull-up resistor, which are respectively arranged in the high-level branch and the low-level branch, with the input terminal of the first resistor R1 connected to the cathode of the forward diode, and the input terminal of the second resistor R2 connected to the anode of the reverse diode.

[0039] In the embodiment, the high-level branch and the low-level branch are used to guide the current and cooperate with the diode to provide a suitable current path under different voltage conditions. The first resistor R1 (pull-down resistor) and the second resistor R2 (pull-up resistor) are respectively arranged on the high-level branch and the low-level branch, and mainly function to stabilize the signal level, smooth the current fluctuation, and reduce the circuit abnormality or misoperation caused by the unstable input signal or noise interference. The input end of the pull-down resistor is connected to the cathode of the forward diode, and when the anode potential of the forward diode is relatively high, the cathode potential of the forward diode is stabilized to a low level through the pull-down resistor, so as to avoid the floating or unstable level in the process of the input signal. The input end of the pull-up resistor is connected to the anode of the negative diode, and the function is to ensure that when the cathode potential of the negative diode is relatively low, the anode potential of the negative diode can be pulled up, so that the voltage of the low-level branch is maintained in the expected high-level state, and unstable signal output is avoided. Specifically, when the alternating current signal is in the positive half cycle, the forward diode is turned on, the current flows from the anode to the cathode of the forward diode and enters the high-level branch. At this time, the pull-down resistor pulls down the cathode potential of the forward diode, so as to ensure that the output signal is stable at the low-level state, and prevent the output signal from being unstable due to fluctuation. When the alternating current signal is in the negative half cycle, the negative diode is turned on, the current flows from the cathode to the anode of the negative diode, and the output signal is output through the low-level branch. At this time, the pull-up resistor pulls up the anode potential of the negative diode, so as to ensure that the output signal is stable at the high-level state, and prevent the voltage from being too low when the low-level output. Through the cooperation of the pull-up resistor and the pull-down resistor, the circuit can ensure that the high-level branch and the low-level branch maintain stable levels in each half cycle. Specifically, the high-level branch stabilizes the negative pole of the signal through the pull-down resistor, and the low-level branch stabilizes the positive pole of the signal through the pull-up resistor. In this way, after the pulsed direct current signal output by the circuit is rectified by the diode, the voltage fluctuation can be effectively balanced, and the stability and anti-interference ability of the circuit are improved. In addition, the configuration of the pull-down resistor and the pull-up resistor can ensure the reasonable flow direction of the current in the circuit, and can also suppress the level floating caused by the input signal, thereby ensuring the stability of the output of the circuit. Through the stability control of the output end, the problem of system instability caused by voltage fluctuation in the use process can be avoided, thereby improving the reliability of the circuit in actual application.

[0040] In an embodiment, the resistance assembly further comprises a third resistor R3 arranged between the forward diode and the first resistor R1, for limiting the voltage value passing through the high-level branch. The resistance assembly further comprises a fourth resistor R4 arranged between the negative diode and the second resistor R2, for limiting the voltage value passing through the low-level branch. The first resistor R1 and the third resistor R3 constitute a voltage dividing resistor, and the second resistor R2 and the fourth resistor R4 constitute a voltage dividing resistor.

[0041] In this embodiment, the third resistor R3 is placed between the positive diode and the first resistor R1, mainly for limiting the voltage value through the high-level branch. The high-level branch is used to process higher voltage signals, and if the voltage is too high, it may cause damage to the circuit or lead to malfunction. Therefore, the role of the third resistor R3 is to limit the voltage value entering the high-level branch through the resistance voltage division principle, to avoid the instability or damage of the circuit caused by the voltage being too high. The third resistor R3 and the first resistor R1 work together to form a voltage dividing resistor network. By adjusting the resistance ratio of the third resistor R3 and the first resistor R1, the voltage value through the high-level branch can be accurately controlled to adapt to different working conditions or load requirements. Similarly, the fourth resistor R4 is placed between the negative diode and the second resistor R2, mainly for limiting the voltage value of the low-level branch. Low-level signals require lower voltage, and if the voltage is too low, it may cause signal distortion or cannot be correctly identified. The fourth resistor R4 limits the voltage value of the low-level branch to ensure stable transmission of the low-level signal and prevent instability of the circuit due to the voltage being too low. Like the second resistor R2, the fourth resistor R4 and the second resistor R2 together form a voltage dividing resistor. By selecting appropriate resistance values, the voltage of the low-level signal can be accurately adjusted to ensure the integrity of the signal. Through the above design, the first resistor R1 and the third resistor R3 together form a voltage dividing resistor for the high-level branch, and the second resistor R2 and the fourth resistor R4 together form a voltage dividing resistor for the low-level branch. The working principle of resistance voltage division is to control the distribution of current and voltage according to Ohm's law and the voltage division formula, using the resistance ratio of the resistors. When current passes through these resistors, the total voltage is distributed to each resistor according to the size of the resistor, thereby achieving voltage value adjustment. For example, in the high-level branch, the resistance ratio of the first resistor R1 and the third resistor R3 determines the size of the high-level output voltage; in the low-level branch, the resistance ratio of the second resistor R2 and the fourth resistor R4 determines the size of the low-level output voltage.

[0042] In an embodiment, a first capacitor C1 is connected with the first resistor R1 for filtering high-frequency noise on the high-level branch; a second capacitor C2 is connected with the second resistor R2 for filtering high-frequency noise on the low-level branch.

[0043] In this embodiment, the first capacitor C1 is connected with the first resistor R1 to form a low-pass filter, mainly used to filter out high-frequency noise on the high-level branch. The high-level branch carries higher voltage signals, and noise may be generated by external electromagnetic interference or switching noise of the circuit itself, etc. These noises often have high frequency components. In order to avoid the influence of these high-frequency noises on the quality of the signal, the first capacitor C1 is configured to form a filter network with the first resistor R1. The principle of the filter is to use the characteristics of resistance and capacitance to filter the signal. The impedance of the capacitor is small in high-frequency signals, so it can effectively guide the high-frequency components to the ground, thereby suppressing noise. For low-frequency signals, due to the large impedance of the capacitor, low-frequency signals can be transmitted normally through the resistor. Therefore, the function of the first capacitor C1 is to effectively filter out high-frequency noise in the high-level branch and maintain the integrity of the signal. Similar to the first capacitor C1, the second capacitor C2 is connected with the second resistor R2 to form a second low-pass filter for filtering high-frequency noise on the low-level branch. The low-level branch is usually used to transmit lower voltage signals, which may be disturbed by external high-frequency noise, resulting in signal distortion or misidentification. By establishing a filter network between the second resistor R2 and the second capacitor C2, high-frequency noise in the low-level branch can be effectively filtered out to ensure the stability of the low-level signal. Since the impedance of the capacitor decreases significantly at high frequencies, the capacitor can effectively guide high-frequency noise to the ground, thereby reducing the interference of noise on the signal. At the same time, since the capacitor has a large impedance to low-frequency signals, low-frequency signals can smoothly pass through the resistor for continuous transmission. This filtering design ensures the signal quality of the low-level branch and reduces the risk of noise introduction. In this embodiment, the first capacitor C1 and the first resistor R1, and the second capacitor C2 and the second resistor R2 together form a low-pass filter. The low-pass filter allows signals below a certain frequency to pass through, while suppressing signals above that frequency. By selecting appropriate capacitor and resistor values, the cutoff frequency of the filter can be set. Generally, the lower the cutoff frequency, the more obvious the attenuation effect of high-frequency signals.

[0044] In an embodiment, a ground port is also included, comprising a first ground end and a second ground end, the first ground end is arranged on the high-level branch, and the second ground end is arranged on the low-level branch, for connecting the high-level branch and the low-level branch with the ground wire; a control chip is also included, which is connected with the high-level branch and the low-level branch.

[0045] In the embodiment, the grounding port comprises two grounding ends, a first grounding end and a second grounding end, which are connected to the high-level branch and the low-level branch respectively. By connecting the two branches to the ground, the circuit instability phenomenon caused by power supply noise, signal interference or electromagnetic wave can be effectively reduced, thereby enhancing the anti-interference ability of the system. The first grounding end is arranged on the high-level branch, and the second grounding end is arranged on the low-level branch, so that the high-level and low-level signals can be connected to the ground through different grounding ports respectively, thereby preventing mutual interference between the high-level and low-level signals and optimizing the isolation and quality of the circuit signals. The control chip receives signals from the high-level branch and the low-level branch through the connection with the high-level branch and the low-level branch, and performs corresponding control processing according to the signals.

[0046] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An OC circuit on an industrial servo drive, characterized by, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip.

2. The OC circuit on an industrial servo drive of claim 1, wherein, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip.

3. The OC circuit on an industrial servo drive of claim 2, wherein, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip.

4. The OC circuit on an industrial servo drive of claim 3, wherein, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip.

5. The OC circuit on an industrial servo drive of claim 3, wherein, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip.

6. The OC circuit on an industrial servo drive of claim 3, wherein, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip.

7. The OC circuit on an industrial servo drive of claim 3, wherein, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip.

8. The OC circuit on an industrial servo drive of claim 1, wherein, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip.

9. The OC circuit on an industrial servo drive of claim 1, wherein, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip.

10. The OC circuit on an industrial servo drive of claim 1, wherein, The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. 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The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and a control chip. The utility model relates to a three-phase alternating current input signal terminal, a diode assembly, a resistance assembly and

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