OD_320E_0F Max Voltage

Object description

Index 320Eh
Object name Closed Loop Controller Parameter
Object Code RECORD
Data type CLOSED_LOOP_CONTROLLER_PARAMETER
Savable yes, category: movement
Access read only
PDO mapping no

Value description

Subindex 0Fh
Name Max Voltage [mV]
Data type UNSIGNED32
Access read / write
PDO mapping no

Description

  • Subindex 0Fh: Maximum permissible PWM voltage (duty cycle). Values ≤ 1000 are interpreted as per mil values (of the available voltage). Values > 1000 as millivolt.

    Also dependent on this value is whether the overmodulation of the voltage vector is used. If overmodulation is used, a higher torque can be achieved. The resulting voltage is no longer sinusoidal, which can result in harmonics and higher losses.

    Value in mV Overmodulation
    1001…U o_low None; the voltage vector describes a circle.
    U o_low…U o_high The voltage vector describes a circle that is increasingly flattened on four/six sides in proportion to the set value.
    ≥U o_high Full; the voltage vector describes a square or a hexagon.
    U o_low
    The lowest voltage above which overmodulation occurs. Is calculated as follows:
    With two-phase stepper motors: operating voltage*1.063
    With three-phase BLDC motors: operating voltage*0.99
    U o_high
    The maximum overmodulation occurs above this voltage. Is calculated as follows:
    Operating voltage*0.9425