Yaskawa PID A1000 - Manual (Page 10)

2 Output Voltage PID
10 YASKAWA TM.A1000SW.061 Output Voltage PID A1000 Custom Software Supplement
‹ Function Description
„ Output Voltage PID Controller
An independent PID controller was added, the output of which will trim the output voltage.
Positive trim range is +13% of E1-05. Negative trim range is negative 100% max voltage (E1-05). There are also two
adjustments available that allow output voltage boost based upon RMS output current and/or Iq current.
The intent is to be able to control the output voltage, AFTER a filter and a transformer, as the output of the drive is NOT
used to drive a motor, but instead operate as a UPS power supply operating at a fixed voltage and frequency. There is a
customer-supplied sensor that converts the output voltage into a 0 - 10V analog signal, which then acts as a PID feedback.
This software allows the user to toggle between a fixed voltage set point (P1-01) and an analog input (H3-0 =21).
Basically, when a multi-function analog input is set to "21", the PID voltage set point becomes that analog input thus
ignoring the setting in P1-01. Conversely, P1-01 will be read as the voltage set point if none of the analog inputs are set to
"21".
The PID function is enabled by meeting all of the following conditions:
• Output Voltage PID is enabled (P1-08 = 1).
• An analog input is programmed to voltage feedback (H3-0 = 20).
• Control Mode is V/Hz (A1-02 = 0).
• Drive is running and at a non-zero output frequency.
• Drive is in the "Speed Agree" condition (soft starter output is at the frequency reference).
„ Output Current Voltage Compensation
The Output Current Voltage Compensation function will add to the output voltage depending upon the quantity of drive
output current. This feature does not require that the Output Voltage PID be enabled in order to operate. First the drive's
internal output current signal is filtered using the P2-02 filter time. Then output voltage is added according to the
following formula:
Added Output Voltage = Filtered Output Current/Drive Rated Current x P2-01
The Output Current Voltage Compensation function is enabled by meeting all of the following conditions:
• The Output Current Voltage Compensation parameter is greater than zero (P2-01 > 0)
• Control Mode is V/Hz (A1-02 = 0).
• Drive is running and at a non-zero output frequency
„ Iq Voltage Compensation
The Iq Voltage Compensation function will add to the output voltage depending upon the quantity of drive Secondary (or
Iq) current. This feature does not require that the Output Voltage PID be enabled in order to operate. First the drive's
internal Iq current signal is filtered using the P2-04 filter time. Then output voltage is added according to the following
formula:
Added Output Voltage = Monitor U6-01 x P2-03
Note: The ratio of E2-03/E2-01 will affect the calculation of Monitor U6-01.
The Iq Voltage Compensation function is enabled by meeting all of the following conditions:
• The Iq Voltage Compensation parameter is greater than zero (P2-03 > 0)
• Control Mode is V/Hz (A1-02 = 0).
• Drive is running and at a non-zero output frequency.