Bosch PIN8 N1 Guia de Resolução de Problemas descarregar pdf (Página 162)

100

101

5-38 Motor, Mechanical Axis System, Measuring Systems MPH-02, MPB-02, MPD-02

DOK-INDRV*-MP*-02VRS**-FK01-EN-P

For asynchronous motors there usually isn’t any value indicated for the

maximum allowed peak current.

For thermal reasons we recommend limitation according to the following

relationships:

Nenn

I2,501090S ∗=−−

S-0-0109: rms value of maximum total motor current (in A)

Nenn

: nominal current, rms value (in A)

Fig. 5-37: Recommendation for rotary motors

I2,501090S ∗=−−

S-0-0109: rms value of maximum total motor current (in A)

: continuous current at standstill, rms value (in A)

Fig. 5-38: Recommendation for linear motors

The value of the parameter S-0-0106, Current loop proportional gain 1

depends on the inductance of the motor (including possibly required

additional motor chokes) between the motor terminals.

)L2(LK01060S

* +

V-U

∗=−−

S-0-0106: current loop proportional gain 1 (in V/A)

U-V

: inductance of motor between terminals (minimum value in mH),

third terminal is not connected

: phase inductance (in mH) of a possibly required choke (3x L

)

K: factor for current loop gain, see table

Fig. 5-39: Calculating the value for S-0-0106

The factor K depends on the switching frequency that was set (P-0-0001)

and the control performance (P-0-0556, bit 2; basic/advanced

performance). The factor K can be taken from the following table:

Control performance

P-0-0556; bit 2

Switching

frequency

(in Hz)

P-0-0001

Factor K

for determining

current loop gain

x 4000 1,4

0 (basic) 8000 2,2

1 (advanced) 8000 2,8

x 12000 3,3

x 16000 4,4

P-0-0001: switching frequency of the power output stage

P-0-0556: control word of axis controller ("x" = 0 or 1)

Fig. 5-40: K-factor for determining the current loop gain

Attention: The measured value of the inductance between the motor

terminals can only be used for asynchronous motors, if the

rotor doesn’t have closed slots (observe manufacturer’s

specification!).

)L2(L

01070S

−

=−−

S-0-0107: current loop integral action time 1 (in ms)

U-V

: inductance of motor between terminals (in mH), third terminal is

not connected

: phase inductance (in mH) of a possibly required choke (3x L

)

U-V

: resistance of the motor between the terminals (in mΩ)

Fig. 5-41: Calculating the value for S-0-0106

S-0-0106, Current loop

proportional gain 1

S-0-0107, Current loop integral

action time 1

1 2 ... 157 158 159 160 161 162 163 164 165 166 167 ... 727 728

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