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Installation and Operation Guide
ED-DT318B
Drive Train Systems with Traction Control, Inverter/Controller, and Motor with 2 Speed Transmission
BC353060341319en-000101
Revision D
© Danfoss | November 2020 | 50
Classified as Business
5.3
Safety Features
The Danfoss Power Solutions motor system provides built-in features to minimize hazardous conditions such as
over motor current, over/under battery voltage, or over motor speed, with configurable values. It also has
features to protect against battery disconnect, conditions causing stall, and hardware failures. These are
discussed in the sections below, beginning with an explanation of limits. In general, these safety features are
provided through limits that regulate the command torque when a problem is detected.
5.3.1
Limits
Limits regulate the torque production when a system condition is close to its limit, such as over motor current,
over/under battery voltage, or over motor speed. The Danfoss Power Solutions Motor Diagnostic Software (see
Section 8
) shows the limitations acting on the torque whenever they are below 100%. The limitations can take
away significant amounts of the deliverable torque of the system. The following table shows the conditions and
the maximum limit that can occur to motoring torque requests and regeneration torque requests.
These limits will be conveyed to the VCU as the Max Drive Torque Allowed (
Section 7.3.4.1
) and Max Regen
Torque Allowed (
Section
) CAN signals.
Table 5.1: Potential Limitations
Cause
Maximum Motoring
Limits
Maximum
Regeneration Limits
Motor velocity over Customer Speed
0% or
-100%
1
NA
Coolant loss detected
0%
0%
No CAN communication
0%
0%
Over temperature (Inverter/Stator/Rotor)
0%
0%
Position bad
0%
0%
Power supply out of specification
0%
0%
System halted
0%
0%
Torque producing current too noisy
0%
0%
Bus current too noisy
0%
0%
Raw bus current too large
0%
0%
Unreliable bus current measurement
0%
0%
Power switch hardware failure
0%
0%
Bus Voltage over Safety Voltage
NA
1%
Bus Voltage over Customer Battery Max
NA
2%
Содержание ED-DT318B
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