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150 Unidrive M Regen Design Guide
Issue Number: 4
VM_SWITCHING_FREQUENCY Range applied to the maximum switching frequency parameters
Units User units
Range of [MIN] 0
Range of [MAX] 0 to 6
Definition
VM_SWITCHING_FREQUENCY[MAX] = Power stage dependent
VM_SWITCHING_FREQUENCY[MIN] = 1 for Regen mode (subject to the maximum)
VM_TORQUE_CURRENT Range applied to the active current
Units %
Range of [MIN] -1000.0 to 0.0
Range of [MAX] 0.0 to 1000.0
Definition
VM_TORQUE_CURRENT[MAX] = VM_MOTOR1_CURRENT_LIMIT[MAX]
VM_TORQUE_CURRENT[MIN] = -VM_TORQUE_CURRENT[MAX]
VM_TORQUE_CURRENT_UNIPOLAR Unipolar version of VM_TORQUE_CURRENT
Units %
Range of [MIN] 0.0
Range of [MAX] 0.0 to 1000.0
Definition
VM_TORQUE_CURRENT_UNIPOLAR[MAX] = VM_TORQUE_CURRENT[MAX]
VM_TORQUE_CURRENT_UNIPOLAR[MIN] =0.0
User Current Maximum Scaling (04.024) defines the variable maximum/minimums VM_USER_CURRENT and
VM_USER_CURRENT_HIGH_RES which are applied to Percentage Load (04.020), Torque Reference (04.008) and
Torque Offset (04.009). This is useful when routing these parameters to an analog output as it allows the full scale
output value to be defined by the user. This maximum is subject to a limit of MOTOR1_CURRENT_LIMIT or
MOTOR2_CURRENT_LIMIT depending on which motor map is currently active.
The maximum value (VM_TORQUE_CURRENT_UNIPOLAR [MAX] varies between drive sizes with default
parameters loaded. For some drive sizes the default value may be reduced below the value given by the parameter
range limiting.
VM_USER_CURRENT Range applied to torque reference and percentage load parameters with one decimal place
Units %
Range of [MIN] -1000.0 to 0.0
Range of [MAX] 0.0 to 1000.0
Definition
VM_USER_CURRENT[MAX] = User Current Maximum Scaling (04.024)
VM_USER_CURRENT[MIN] = -VM_USER_CURRENT[MAX]
User Current Maximum Scaling (04.024) defines the variable maximum/minimums VM_USER_CURRENT and
VM_USER_CURRENT_HIGH_RES which are applied to Percentage Load (04.020), Torque Reference (04.008) and
Torque Offset (04.009). This is useful when routing these parameters to an analog output as it allows the full scale
output value to be defined by the user. This maximum is subject to a limit of MOTOR1_CURRENT_LIMIT or
MOTOR2_CURRENT_LIMIT depending on which motor map is currently active.
The maximum value (VM_TORQUE_CURRENT_UNIPOLAR [MAX] varies between drive sizes with default
parameters loaded. For some drive sizes the default value may be reduced below the value given by the parameter
range limiting.
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