Page 672 - Mechatronics with Experiments

658 MECHATRONICS
−3
In SI units, K = K , where as in CGS units K Nm∕A = 9.5493 × 10 K V∕krpm. Then
T E T E
we can find the maximum torque developed at stall and at 1200 rpm speed.
T stall = K ⋅ i (8.219)
T
= 9.5493 × 10 −3 × 15 × 96 Nm (8.220)
= 13.75 Nm at stall (8.221)
T = 9.5493 × 10 −3 × 15 × 24 Nm (8.222)
r
= 3.43 Nm at 1200 rpm (8.223)

Example: PWM Control H-Bridge IC Drive for Brush-Type DC Motors–
TPIC0107B The integrated circuit (IC) package TPIC0107B by Texas Instruments
implements an H-bridge and switching control logic for brush-type DC motors (Fig-
ure 8.34). The drive supply voltage (V ) must be in the 27 VDC to 36 VDC range, and
cc
support up to 3 A continuous bridge output current. The two terminals of the DC motor

5 V
V CC
100 kΩ
V CC
IN1 OUT1
IN2 TPIC0108B M 100 nF 47 μF †
STATUS1
OUT2
STATUS2
GND GNDS
Control diagnostic
microcontroller
(a)
V CC

Over-
current
IN1 protection Over-
HSD voltage
IN2 Logic detection
STATUS1
STATUS2 DMOS DMOS
driver driver

5 V Charge
Reg. pump Open- Out2 Out1
(2 MHz) Load-dump
circuit protection
detect
Under- Over-
voltage temperature
detection detection DMOS DMOS
driver driver

Over-
current
protection
LSD
GND
(b)
FIGURE 8.34: PWM controlled H-bridge integrated circuit chip for brush-type DC motors:
TPIC01017B by Texas Instruments. Source: Texas Instruments.