---
name: "clarke2"
section: "9"
platform: "linux"
package: "linuxcnc-uspace"
version: "1:2.9.4-2+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/clarke2"
---

# clarke2(9)

Two input version of Clarke transform

## NAME

clarke2 - Two input version of Clarke transform

## SYNOPSIS

**loadrt clarke2 \[count=*N*\|names=*name1*\[,*name2...*\]\]**

## DESCRIPTION

The Clarke transform can be used to translate a vector quantity from a three phase system (three components 120 degrees apart) to a two phase Cartesian system.

**clarke2** implements a special case of the Clarke transform, which only needs two of the three input phases.  In a three wire three phase system, the sum of the three phase currents or voltages must always be zero.  As a result only two of the three are needed to completely define the current or voltage. **clarke2** assumes that the sum is zero, so it only uses phases A and B of the input.  Since the H (homopolar) output will always be zero in this case, it is not generated.

## FUNCTIONS

- **clarke2.***N* (requires a floating-point thread)

  ## PINS

- **clarke2.*N*.a float in**

  - **clarke2.*N*.b float in**

  first two phases of three phase input

- **clarke2.*N*.x float out**

  - **clarke2.*N*.y float out**

  cartesian components of output

## SEE ALSO

[**clarke3**(9)](/clarke3/9.md) for the general case, [**clarkeinv**(9)](/clarkeinv/9.md) for the inverse transform.

## AUTHOR

John Kasunich

## LICENSE

GPL