maxon motor
18
maxon motor control
1-Q-EC Amplifier DEC Module 50/5
Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
The minimum inductance of each choke can be calculated with the formula
below:
¸¸
¹
·
¨¨
©
§
t
Motor
N
PWM
CC
Phase
L
I
f
V
L
3
.
0
6
2
1
L
Phase
[H]
Additional external inductance per phase
V
CC
[V]
Power supply vV
CC
f
PWM
[Hz]
PWM frequency = 46 800 Hz
I
N
[A]
Nominal motor current
L
Motor
[H]
Terminal inductance phase to phase of the motor
If the result of the calculation is negative, no additional chokes are necessary.
Nevertheless, the use of chokes in combination with additional filter compon-
ents can be useful to reduce the emission of electromagnetic interference.
An additional choke must feature electromagnetic shielding, a high saturation
current, minimal losses, and a nominal current greater than the continuous
current of the motor. The below wiring example refers to an additional in-
ductance of 22 μH. If a different additional inductance is required, also the
filter components must be adapted accordingly.
Should you need further help with the filter design, contact maxon Support at
http://support.maxonmotor.com
.
L1
22uH
J2/3
1
Motor winding 1
10
GND
Motor winding 1
560R
150p
68p
2
Motor winding 1
9
GND
DEC Module 50/5
Motherboard (customer-specific)
Motor
Wiring of Motor Winding 1 (analogously valid also for Motor Windings 2 & 3)
Recommendations for the motor chokes:
–
Würth Elektronik WE-PD-XXL 7447709220
L
N
= 22
μ
H, R
DC
= 23.3 m
Ω
, I
DC
= 5.3 A, I
sat
= 6.5 A, shielded
–
Coiltronics DR127-220
L
N
= 22
μ
H, R
DC
= 39.1 m
Ω
, I
DC
= 4.0 A, I
sat
= 7.6 A, shielded
Würth Elektronik WE-PD-XXL 7447709150
L
N
= 15
μ
H, R
DC
= 21 m
Ω
, I
DC
= 6.5 A, I
sat
= 8.0 A, shielded
–
Sumida CDRH129RNP-150MC
L
N
= 15
μ
H, R
DC
= 16 m
Ω
, I
DC
= 6.0 A, I
sat
> 6.0 A, shielded
–
Coiltronics DR127-150
L
N
= 15
μ
H, R
DC
= 25 m
Ω
, I
DC
= 5.0 A, I
sat
= 9.7 A, shielded
–
Bourns SRR1280-150M
L
N
= 15
μ
H, R
DC
= 28 m
Ω
, I
DC
= 5.2 A, I
sat
> 5.2 A, shielded
–
Würth Elektronik WE-PD-XL 744770115
L
N
= 15
μ
H, R
DC
= 24 m
Ω
, I
DC
= 5.0 A, I
sat
= 6.0 A, shielded
–
Sumida CDR127/LDNP-150M
L
N
= 15
μ
H, R
DC
= 20 m
Ω
, I
DC
= 5.7 A, I
sat
> 5.7 A, shielded