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FAQs Library
Q
Do you have solution for single-phase pump?
2020-11-02
A

GD100-PV is a professional photovoltaic water pump driver. The -SS2 model integrated a special single-phase pump special algorithm, which can support driving single-phase 220V pumps. Divided into two kinds of schemes, one is not to dismantle the water pump capacitor, directly connected to U and W terminals. Another solution needs to removed the water pump capacitors,connected to the UVW terminal according to the schematic diagram in the GD100-PV operating manual.Normally we suggest to remove the water pump capacitors.

Q
How to debug GD35 with servo motor for position control?
2020-11-02
A

GD35 with servo motor is to first understand the encoder type of servo motor, select the matching GD35 inverter model, 50Hz corresponding voltage, back EMF and pole number and other parameters. P20.11 do autp-tunning of magnetic pole position. Change P21.00 to 1 position control pulse train setting. In addition, P20.13 is changed to 0 disable, the current loop of P03.09 can be increased by about 1500. "

Q
What models can the GD20-EU's keypad be used for?
2020-11-02
A

INVT LED keypad can use for different series.Big LED keypad and small LED keypad can't be used for each other.
Small keypad series:GD10&GD20%GD100-PV&BPD
Big keypad series:GD200A&GD300&GD35&GD350&GD350A

Q
How to solve the problem of GD20 overheating problem?
2020-11-02
A

Overheating is a common fault. When encountering this kind of situation, we will first think about whether the cooling fan is running, whether the fan is blocked, whether the ambient temperature is too high, the inverter is not well ventilated, and the temperature detection circuit is faulty.

Q
How to select battary capacity for BN E series off grid inverter?
2020-11-02
A

It needs to be calculated according to the actual demand of customers. If the customer needs to use 3kW load for 1 hour, then the output power of the inverter should be 3kWH. Due to the inverter's own loss, the minimum full load efficiency is 88%, so the maxmum required battary capacity  is 3kWH/0.88

Q
What is SVC control for GD5000?
2020-10-28
A

SVC(sensorless vector control),Open loop vector control, vector control without encoder.

Q
What is the GD100-PV's MPPT function?
2020-10-28
A

MPPT is the abbreviation of Maximum power point tracking,according to the working principle of photovoltaic panels, the VFD must support the MPPT function to ensure that the photovoltaic panels always work at the maximum power output point, otherwise the photovoltaic panels cannot work at the best status.

Q
How to use GD35's big power model to control smaller motor?
2020-10-28
A

For P00.00 = 1,  SVC1. As you know, the motor's power is too small, compared with inverter, the range is too big. So my suggestions for user's reference.
After auto-tuning, try to adjust P02.07 and P02.08's value a little smaller, don't adjust too big, and see the performance.  Or adjust P03.03 a little smaller, 18, 15, see the performance.
Rotor resistance does not affect the output voltage, but it will make the speed identification worse, which will result in higher or lower actual speed (bigger rotor resistance) or smaller rotor resistance (smaller rotor resistance), too large rotor resistance will also cause control instability, too small rotor resistance may cause insufficient output.
Large leakage inductance parameters may lead to current oscillation.

Q
How to adjust GD20-EU's carrier frequency in the parameters?
2020-10-28
A

The carrier frequency is an important parameter for the VFD operation. If increase it, the output waveform will be better and the electromagnetic noise will be smaller, but it will increase the inverter's operating temperature, poor heat dissipation, and greater leakage current. The factory default parameters have been reasonably set, and adjustments are not recommended. If it is adjusted larger, the inverter needs to be derated for use. For every additional 1k, derate by 10%.

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