EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

• Acceleration/Deceleration pattern (H07)
H07 specifies the acceleration and deceleration patterns (patterns to control output frequency).
Data for
H07
0
1
2
3
Acceleration/
deceleration
pattern
Linear
S-curve
(Fixed)
S-curve
(Adjustable)
Curvilinear
Motion
The inverter runs the motor with the constant acceleration and
deceleration.
To reduce an impact that Fixed:
acceleration/deceleration The acceleration/deceleration rate
would make on the machine, to be applied to all of the four
the inverter gradually
inflection zones is fixed at 5% of
accelerates or decelerates the maximum frequency.
the motor in both the starting
Adjustable:
and ending zones of
acceleration or deceleration. The acceleration/deceleration rate
can be arbitrarily specified for each
of the four inflection zones.
Acceleration/deceleration is linear below the base frequency
(constant torque) but it slows down above the base frequency to
maintain a certain level of load factor (constant output).
This acceleration/deceleration pattern allows the motor to accelerate
or decelerate with the maximum performance of the motor.
Function
code
-
-
H57
H58
H59
H60
-
S-curve acceleration/deceleration
To reduce an impact that acceleration/deceleration would make on the machine, the inverter gradually accelerates
or decelerates the motor in both the starting and ending zones of acceleration or deceleration. Two types of
S-curve acceleration/deceleration rates are available; applying 5% (fixed) of the maximum frequency to all of the
four inflection zones, or specifying adjustable rate for each of the four zones with function codes H57 to H60. The
reference acceleration/deceleration time determines the duration of acceleration/deceleration in the linear period;
hence, the actual acceleration/deceleration time is longer after applying S-curve.
Acceleration
Deceleration
Starting zone Ending zone Starting zone Ending zone
S-curve (Fixed) 5% 5% 5% 5%
S-curve (Adjustable)
Setting range: 0 to
100%
H57
Acceleration rate
for the 1st S-curve
(Leading edge)
H58
Acceleration rate
for the 2nd
S-curve
(Trailing edge)
H59
Deceleration rate
for the 1st
S-curve
(Leading edge)
H60
Deceleration rate
for the 2nd
S-curve
(Trailing edge)
Acceleration or deceleration time (s) = (2 5/100 + 90/100+ 2 5/100) (reference acceleration or deceleration time)
= 1.1 (reference acceleration or deceleration time)
Acceleration or deceleration time (s) = (2 10/100 + 70/100 + 2 20/100) (reference acceleration or deceleration time)
= 1.3 (reference acceleration or deceleration time)
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