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Everest XCR - Product manual | Wiring and Connections
INGENIA | 2020-10-01 00:04:38 40
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9.3. Power Supply and Motor Power
9.3.1. Single Power Supply
The Everest XCR can be powered from a single power supply as shown in the following figure. Since the power
cables are soldered to the board it is essential to provide mechanical fastening to avoid ripping them off.
9.3.1.1 Power Supply Requirements
The choice of a power supply for Everest is mainly determined by the following criteria:
The power supply must be isolated with a minimum Overvoltage Category of II (Typ ≥ 2500 V isolation). This
does not apply if the Everest is battery-powered and isolated from the electrical grid.
The
voltage should be targeted for the motor and its speed requirements. See How to dimension a power
supply for an Ingenia drive . Ensure it is always within the operating ranges of the Everest specifications. It is
strongly recommended to leave a margin between the nominal voltage and the maximum absolute of the
drive (80 V) to allow some regenerative braking. Working near the limits can cause faults. Note that for
safety-critical applications a
≤ 50 V power supply has the advantage that all circuits can be considered Safe
Extra Low Voltage (SELV) which simplifies installation protection against electric shock.
The current should be the one able to provide the electrical power of the application. The conservative
approach is to choose the power supply rated current as your maximum motor current. This conservative
approach, however, can lead to oversized power supplies since the DC current is typically lower than the
motor current. See Understanding why the motor phase current is different than the power supply current .
The power supply current should be determined according to the maximum power point where the product
speed · torque is maximum. See more details here How to dimension a power supply for an Ingenia drive .
Also, consider the simultaneity factor when having various drives in parallel.
Servo drive systems tend to have large current peaks and regenerate. This can cause overvoltage faults,
under-voltage, or even unstabilize the control loop of the power supply. It is preferred to choose robust
power supplies with current limiting behavior, overvoltage margin from the nominal, and non-latching fault
to prevent shut-down in case of a transient regeneration or overload.
The transformer and rectifier type supplies are simple and reliable. Switch Mode Power Supplies (SMPS) provide
good efficiency, low harmonic distortion. Always choose good quality, EMC compliant power supplies.
To determine if the system may have regenerative braking issues check: Dimensioning a Shunt Resistor for
Regenerative Braking . See shunt wiring next.