Features when used as signal generator for inverter control

 

♦ Generation of inverter control signals (DG-801 inverter/PPG option)

- The control pulse required for testing inverters can be created easily.

- Four types of control signals can be output: buck chopper-, single phase unipolar and bipolar-, as well as 3-phase and 2-level signals

 

♦ Seamless changing

- Parameters such as frequency and pulse width can be changed seamlessly while the device is oscillating.

 

♦ Gap time control

- Can prevent upper and lower phases from being turned on simultaneously in U-X-phase, V-Y-phase and W-Z-phase devices.

 

♦ External modulation (DG-601 option)

- Parameters such as  the pulse width and delay can be modulated by using an external signal.

 

♦ Operation pattern control (DG-802 option)

- A continuous running pattern test can be performed by using variable frequency control.

 

 

Creation and output examples for inverter control signal

Inverter control signals can be created by specifying the following settings:

1.The carrier frequency (Fc),

2.The modulation frequency (Fm),

3.The modulation factor (the ratio of the carrier amplitude to the amplitude of the modulation waveform)

 

 

 

Using gap time control to prevent upper and lower phases from being turned on simultaneously

 

By using gap time control, dead time is automatically created.

 

- The dead time interval remains constant regardless of whether frequency or cycle is changed.

- The gap time can be changed while the device is oscillating.

- A negative time can be set to make phases overlap intentionally creating a time when the upper and lower phases are simultaneously on.

 

 

Example of variable frequency control of PWM (pulse width modulation) signals

 

 

PWM signals can be output easily. This feature is

ideal for inverter testing.

By using the inverter/PPG option, the output of PWM signals can be easily obtained, making inverter

testing easy.

 

The output of four types of signals can be obtained:

buck chopper-, single phase unipolar and bipolar-,

as well as 3-phase and 2-level signals.

Configuration example:

- Main unit (DG-8000),

- Inverter/PPG option (DG-801);

 

The variable frequency control of PWM signals can be controlled. This feature is ideal for

performing continuous inverter running tests.

By using the running pattern option, the variable

frequency and modulation factor can be controlled, making it easy to perform a continuously running test. The control pattern is controlled by an appropriate arbitrary waveform specified.

 

 

Configuration example:

- Main unit (DG-8000),

- Inverter/PPG option (DG-801),

- Operation pattern option (DG-802);

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Customer support

 

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Fax: +49 6196 5927 - 949
Mail: sales{scrmblml}hf-instruments.com