maxon motor control
13
maxon motor
Operating Instructions
1-Q-EC Amplifier DEC Module 24/2
April 2015 Edition / document number 1002422_PDF_E - 04 / subject to change
6 Protective functions
6.1 Undervoltage protection
The power stage will be disabled in case the supply vV
CC
gets lower
than 6.5 VDC.
To reset the fault condition the amplifier must be disabled and the supply
vV
CC
must be higher than 6.5 VDC.
6.2 Overvoltage protection
The power stage will be disabled in case the supply vV
CC
gets higher
than 30 VDC.
To reset the fault condition the amplifier must be disabled and the supply
vV
CC
must be lower than 29 VDC.
6.3 Thermal overload protection
The power stage will be disabled in case the power stage temperature ex-
ceeds higher than 95°C.
To reset the fault condition the amplifier must be disabled and the power
stage temperature must fall below 75°C.
6.4 Invalid Hall sensor signals
The power stage will be disabled in case invalid conditions in the Hall sensor
inputs during the power-up occurs.
To reset the fault condition the amplifier must be disabled and the Hall sen-
sors must be wired correctly.
6.5 Blockage protection
If the motor shaft is blocked for longer than 1.5 s, the current limit is set at
2.5 A, provided the current limit was not set lower via «Set current limit»
input.
Definition «Motor shaft blocked»: A lower speed than 400 rpm (motor with
1 pole pair) occurs for longer than 1.5 s.
Note
Ö
No fault message occurs at the «Ready» output if blockage protection is
active.
6.6 Current limitation
The motor current will be restricted to 0.5…3 A depending on the value
applied to the input «Set current limit» by means of a cycle-to-cycle limitation
(see chapter
«5.1.5 «Set current limit»»
).
Note
Ö
No fault message occurs at the «Ready» output if current limitation is
active.
