Yaskawa servo drive maintenance

Yaskawa servo drive
Yaskawa servo drive (rr), also known as Yaskawa servo controller and Yaskawa servo amplifier, is a controller used to control servo motors. Its function is similar to that of a frequency converter on ordinary AC motors. Part of the servo system, mainly used in high-precision positioning systems. Generally, the servo motor is controlled through three methods: position, speed and torque to achieve high-precision positioning of the transmission system. It is currently a high-end product in transmission technology.
Yaskawa servo driver is a controller used to control servo motors. Its function is similar to that of a frequency converter on ordinary AC motors, and it is part of the servo system. Currently, mainstream Yaskawa servo drives use digital signal processors (DSPs) as the control core, which can implement relatively complex control algorithms and achieve digitization, networking and intelligence. Power devices generally use drive circuits designed with intelligent power modules as the core. The drive circuit is integrated inside and has fault detection and protection circuits such as overvoltage, overcurrent, overheating, and undervoltage. A soft-start circuit is also added to the main circuit to Reduce the impact of the startup process on the drive. The power drive unit first rectifies the input three-phase power or mains power through a three-phase full-bridge rectifier circuit to obtain the corresponding direct current. The rectified three-phase power or mains power is then driven by a three-phase sinusoidal voltage inverter to drive a three-phase permanent magnet synchronous AC servo motor. The entire process of the power drive unit can simply be said to be the process. The main topological circuit of the rectifier unit () is a three-phase full-bridge uncontrolled rectifier circuit.
Compared to desktop computers () and laptops (b), Yaskawa servers (rr) are a common "noun" for many people, but there is very little actual experience with it. However, Yaskawa server systems are commonly used in many applications in human daily life. The information we often come into contact with is almost all the results provided by Yaskawa servers after calculations. The meaning of the Yaskawa server is to provide processed information to serve others (rr), so that other terminals connected to the server through the network can quickly obtain the required data or results and output them to the required objects.
Yaskawa servo drives can generally adopt three control methods: position, speed and torque. They are mainly used in high-precision positioning systems and are currently the high-end of transmission technology. With the large-scale application of servo systems, the use of Yaskawa servo drives, Yaskawa servo drive debugging, and Yaskawa servo drive maintenance are all important technical issues for servo drives today. More and more industrial control technology service providers have carried out technical research on Yaskawa servo drives. Research in depth.
Yaskawa servo drive maintenance experience summary:
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When the oscilloscope checked the current monitoring output of the drive, it was found that it was all noise and could not be read
Cause of failure: current monitoring output No isolation from AC power (transformer).
Treatment method: You can use a DC voltmeter to detect and observe.
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The motor runs faster in one direction than the other direction
Cause of fault: Phase misalignment of brushless motor
Treatment method: Detect or find out the correct phase.
Cause of failure: When not used for testing, the test/deviation switch is in the test position.
Solution: Turn the test/deviation switch to the deviation position.
Cause of failure: The position of the deviation potentiometer is incorrect.
Solution: Reset.
Motor Stall
Cause of failure: The polarity of the speed feedback is wrong.
Solution: You can try the following methods.

If possible, move the position feedback polarity switch to another position. (This is possible on some drives)
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b. If using a tachometer, swap the + and switches on the drive.
If using an encoder, swap the input and B on the driver.

For example, in speed mode, swap - and B on the driver, and then swap and connect them with B.
Cause of failure: The encoder power supply lost power during encoder speed feedback.
Treatment method: Check the connection to the encoder power supply. Make sure the power supply can provide sufficient current. If using an external power supply, ensure that this voltage is to the driver signal ground.
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The light is green, but the motor does not move
Cause of fault: The motor in one or more directions is prohibited from operating.
Solution: Check + and port.
Cause of fault: The command signal is not connected to the driver signal ground.
Solution: Connect the command signal ground to the driver signal ground.
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After powering on, the driver’s light does not light up
Cause of the fault: The power supply voltage is too low, less than the minimum voltage value requirement.
Solution: Check and increase the power supply voltage.
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When the motor rotates, the light flashes
Cause of fault: phase error.
Solution: Check whether the motor phase setting switch (/) is correct. Most brushless motors have phase differences.
Cause of failure: Sensor failure
Treatment method: Detect the voltage of B when the motor rotates. The voltage value should be between and .
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The light always remains red
Cause of fault: There is a fault.
Treatment method: Reasons include overvoltage, undervoltage, short circuit, overheating, driver prohibition, and invalidity.