HCTL-1101 Avago Technologies US Inc., HCTL-1101 Datasheet - Page 28

• Manufacturer Part Number: HCTL-1101
• Description: IC MOTION CONTROL GP 40DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of HCTL-1101

• Applications: DC Motor Controller, Stepper Motor Controller
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Number Of Outputs: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The parameters of Ring, X, Y, and Max Advance must be
positive numbers (00H to 7FH). Additionally, the following
equation must be satisfied:
In order to utilize the greatest flexibility of the Commuta-
tor, it must be realized that the Commutator works on a
circular ring counter principle, whose range is defined by
the Ring register (R18H). This means that for a ring of 96
counts and a needed offset of 10 counts, numerically the
Offset register can be programmed as 0AH (10D) or AAH
(-86D), the latter satisfying Equation 8.
If bit #2 in the Status register is set to allow the commuta-
tor to count in full counts, a higher resolution codewheel
may be chosen for precise motor control without violating
the commutator constraints equation (Equation 8).
Figure 11. Phase Advance vs. Motor Velocity.
28
Example:
Suppose you want to commutate a 3-phase 15 deg/step
Variable Reluctance Motor attached to a 192 count en-
coder.
1. Select 3-phase and quadrature mode for commutator
2. With a 3-phase 15 degree/step Variable Reluctance
3. Ring register
4 By measuring the motor torque curve in both directions,
by writing 0 to R07H.
motor the torque cycle repeats every 45 degrees or 8
times/revolution.
= (4)(192) counts/revolution
= 8/revolution
= 96 quadrature counts
= 1 commutation cycle
it is determined that an offset of 3 mechanical degrees
and a phase overlap of 2 mechanical degrees is
needed.