DQ to ABC Transform VI

Owning Palette: Transforms VIs

Requires: Electric Motor Simulation Toolkit

Transforms the direct and quad currents or voltages to three-phase current or voltage.

The three-phase current or voltage is the AC current or voltage of the three-phase circuit, while the d, q currents or voltages are the direct and quad current or voltage in the flux, torque (d, q) rotating reference frame.

Details  

	d specifies the direct current or voltage, in amperes or volts, from the Clarke and Park transform.
	q specifies the quad current or voltage, in amperes or volts, from the Clarke and Park transform.
	rotor position specifies the mechanical rotor position, in degrees, of the electric motor.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	a returns the a current or voltage, in amperes or volts, calculated by the inverse Park and Clarke transform.
	b returns the b current or voltage, in amperes or volts, calculated by the inverse Park and Clarke transform.
	c returns the c current or voltage, in amperes or volts, calculated by the inverse Park and Clarke transform.
	error out contains error information. This output provides standard error out functionality.

DQ to ABC Transform Details

The equations for transforming current and voltage are similar. This section takes the current equations for an example.

This VI converts the direct and quad currents to three-phase current using the following equations:

where	Ia is the a current of the three-phase current
	Ib is the b current of the three-phase current
	Ic is the c current of the three-phase current
	Id is the d or direct current
	Iq is the q or quad current
	θ is the mechanical rotor position in radians

The values of I_a, I_b, and I_c also come out of the following equations:

where