STEVAL-IHM021V1 STMicroelectronics, STEVAL-IHM021V1 Datasheet - Page 17

• Manufacturer Part Number: STEVAL-IHM021V1
• Description: BOARD EVAL L6390/STD5NK52ZD
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of STEVAL-IHM021V1

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: L6390, STD5NK52ZD-1
• Primary Attributes: 3-Ph PMSM, 100 W 3-Phase Inverter, 110 ~ 230VAC
• Secondary Attributes: Field-Oriented Control (FOC) of Sinusoidal-Shaped Back-EMF
• Input Voltage: 110 V to 230 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6390, STD5NK52ZD-1
• Other names: 497-8404

UM0580
8.3
Since the overcurrent protection acts as soon as the voltage on CP+ rises above Vref
(approximately equal to 0.53 V), and given the default value of the shunt resistors (equal to
1.8/4 =0.45 Ω), it follows that the default value for the maximum allowed current (I
equal to:
Equation 1
If necessary, you can decrease the threshold by adding R37 (and similarly R55 and R18)
with the formula:
Equation 2
Similarly, you can increase the threshold by adding R44 (and similar) with the formula:
Equation 3
Current sensing amplifying network
Figure 11
Figure 11. Current sensing amplifying network
shows the current sensing amplifying network during phase 2.
I
CP
=
R
shunt
1
I
⋅
CP
R40
=
R37
R
+
V
shunt
R37
ref
⋅
⎡
⎢
⎣
⎛
⎜
⎝
I
V
CP
1
ref
+
=
R40
R44
−
R
3.3
V
shunt
Ref
⎞
⎟
⎠
R37
≅
R40
+
. 1
R40
15
with
A
⎤
⎥
⎦
R37
>>
with
R40
R37
Board schematics
>>
R40
AM01267v1
CP
) is
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