Yaskawa inverter maintenance

Yaskawa frequency converter
The full name is Yaskawa AC variable frequency speed regulator. It is mainly used for three-phase asynchronous AC motors to control and adjust the motor speed. Yaskawa inverter is one of the world-renowned inverters, produced by Yaskawa Electric Co., Ltd. Originating from Yaskawa Electric's input understanding of electric motors, Yaskawa inverters have been recognized by the global industrial field for their excellent control performance and excellent product quality, relying on Yaskawa people's unique technology and the concept of contributing to society and public undertakings. Yaskawa inverters represent high performance, high reliability and high safety.
: Frequency converter adjustment
Lift the car, remove the wire rope, and confirm that no safety failure will occur when the motor is idling.
Install the encoder as required, and connect the encoder wires to the socket.
Strongly activate the holding brake and contactor B, and effectively pull in the input and output contactors of the frequency converter. Observe whether the holding brake is open and confirm that there is no friction resistance when the motor is idling.
Set the inverter parameter - to 3, and set the inverter related parameters as described in Chapter 1.
Set up the inverter and follow the method described in. The inverter menu will appear. A total of data needs to be entered, in order:
Rated voltage of the motor []
Rated current of the motor []
R rated frequency of the motor []
R rated speed of the motor [ R〕
b Motor pole number
/Drive motor number
/Number of rotary encoder pulses
: Case analysis:
The inverter displays a fault just after the elevator starts
br/> It means feedback is lost, possible reason 1: the brake is not opened due to electrical or mechanical reasons, or the motor is mechanically stuck. Possible reason 2: The encoder power cord is disconnected or connected incorrectly. Possible reason three: If the curve starting or stopping time is set too long, because the actual speed of the elevator is close to the maximum speed when the elevator starts or stops, the traction force is small, and when the car is in.
When the load is heavy or full, the traction machine may not be able to pull the car. At this time, the inverter still outputs the speed command, and a fault occurs
The inverter suddenly displays a fault while the elevator is running
/>The meaning is that the frequency converter has overcurrent. The first possible reason is that the encoder is damaged, causing abnormal feedback and causing the frequency converter to overcurrent during the speed adjustment process. Possible reason two is that the insulation of the motor winding is damaged, and a short circuit will also cause overcurrent. Possible reason: The load is too large and the acceleration time is too short.
The inverter suddenly displayed a fault while the elevator was running.
It means overvoltage on the DC side of the main circuit. Possible reason 1: There is a sudden drop in the analog given voltage. You can add an acceleration and deceleration slope in the inverter parameters, for example,
Possible reason 2: The following inverter input voltage-parameter settings are improper. Generally, set, such as If 3 is set, the above fault may occur when decelerating upward. Possible reason three is that the load is too large and the deceleration time is too short. Possible reason 4: The braking resistor (braking unit) is improperly configured or damaged.
The inverter fails when the elevator stops
It means a ground fault (the ground current on the output side of the inverter exceeds the rated output current of the inverter). The reason is usually caused by the non-zero current release of the output side contactor. Check whether the inverter parameter B is set to (free coasting stop). You can add a base blocking signal before the output contactor is released during parking. In addition, a short circuit between the inverter and the motor and any phase to ground is also one of the reasons - improper setting may also cause a fault.
The inverter fails when the elevator stops and cannot be restored.
It means that the DC side fuse is blown, usually the brake transistor is damaged, causing the fuse to blow out.
The inverter fails when the elevator stops and cannot be restored.
It means the load is short-circuited. Possible reasons: One module B of the inverter is damaged.
Possible reason two is that the motor winding is short-circuited.
There is a step on the given curve when the elevator express decelerates and enters the insert board.
In order to ensure that the given curve is directly parked on the leveling insert plate, the distance error will be corrected. If the error is large, steps will be generated on the given curve

Causes of distance error
. The lengths of the hoistway leveling boards are different, because when the hoistway is learned, the system needs to record the length of the floor board and the distance between the leveling sensors. If the plug-in boards on other floors are long or short, it will cause errors in the calculation of pulses during parking.
. The encoder is subject to interference. Sometimes the grounding condition of the computer room is not good, and the encoder signal entering the main board may be interfered, resulting in positioning errors.
3. The wire rope of the traction machine is slipping. You can use chalk to make a mark on the wire rope and the traction sheave, and then drive it up and down to see if there is any relative displacement of the mark. Large relative displacement: If the wire rope is dirty, the wire rope must be cleaned. If the wire rope or traction sheave is greatly worn, the relevant parts must be replaced.
. The leveling sensor malfunctions or is interfered with.
When used for vector control, the frequency converter parameters are set according to our recommended values, and the frequency converter has also undergone motor auto-tuning, but when the frequency converter still does not match the motor well during operation, it may be that the frequency converter parameters have been adjusted. Messy. At this time, you can first record all the parameter values after self-tuning, and then reset the inverter parameters to the factory values, and then set the recorded parameters. Other parameters of the inverter should be set and debugged according to our company's recommended values and some parameters required on the actual site. That’s it.
Parameters for comfort adjustment of Yaskawa inverter elevator
: Generally, there is vibration at high speed, ↘, ↗ is better, there is vibration at low speed, 3↗, ↘ is better.
Remarks on the recommended value adjustment range
Speed loop proportional gain (at high speed) ~
Speed loop integral gain (at high speed) . .~. (generally not adjusted)
Speed loop proportion Gain (at low speed) ~
Speed loop integral gain (at low speed) . .3~. (generally not adjusted)
Switching frequency ~
If it is the digital segment speed setting mode, < br/> Remarks on the recommended value adjustment range
Acceleration time. .~3. The larger the value, the faster the acceleration.
Deceleration time. .~3. The larger the value, the faster the deceleration.
Acceleration start curve. .~ . The larger the value, the smoother the start.
Acceleration completion curve. .~. (generally not adjusted)
Deceleration start curve. .~. (generally not adjusted)
Deceleration completion curve. .~. The more The larger the stop, the smoother it is
4. Overview of debugging comfort
In summary, the following related factors can generally be considered for elevator comfort debugging: (analog quantity)
. When the elevator starts:
． Motherboard acceleration slope, curve, brake delay time
b. Frequency converter: 3, ,
Mechanical guide shoe tightness, wire rope tensioning uniformity
. When the elevator stops:
． Main board deceleration slope, curve 3, brake delay time, leveling adjustment
b. Frequency converter: 3, ,
Mechanical guide shoe tightness, wire rope tensioning uniformity
3. When the elevator is running at high speed:
． Frequency converter:,
b. Mechanical guide rail verticality, guide rail joint processing, and wire rope tensioning uniformity
. Peripheral circuit configuration
. Digital input:
Terminal forward running board:
Terminal reverse running board:
Terminal 3 external fault is programmable
If not used Terminal 3, the inverter will still falsely report an external fault, you can set
Terminal multi-step speed given programmable board:
Terminal multi-step speed given programmable board:
Terminal multi-step speed given programmable board:
Terminal multi-step speed given programmable board: Programming board:
The terminal is a common terminal board: Board:
. Digital output (relay): - Frequency converter operating signal is programmable
Board: Series brake contactor coil circuit board:
- Frequency converter fault board: Board:
.Analog input:
- (~ - ) Board: - Board:
. Description of some important parameters
All parameters can be read/set
(Closed loop) (Open loop)
Initialization (generally not used)
B stop mode (coast stop)
/> Acceleration time
Deceleration time
Acceleration start curve digital value adjustable parameter value
Acceleration completion curve analog value is generally not used
Deceleration start curve
Deceleration completion curve
Speed loop proportional gain (at high speed)
Speed loop integral gain (at high speed)
Speed loop proportional gain (at low speed)
Speed loop integral gain (at low speed)
R switching frequency (the dividing value between high-speed and low-speed areas)
The carrier frequency is generally not adjusted. It can only be adjusted when the motor operates normally but the sound is sharp and abnormal
- Crawl speed
- Maintenance speed digital adjustable parameter value
- The single-layer speed analog value is not used, both are
- Dual-layer speed
- Multi-layer speed
- Input voltage setting is generally set to
- Maximum output frequency