TECO-Westinghouse EQ7 Series, Instruction Manual, Page: 108 / 248

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
Acceleration/Deceleration pattern (H07 )
H07 specifies the acceleration and deceleration patterns (patterns to control output frequency).
Data for
H07
Acceleration/
deceleration
pattern
Motion
Function
code
0
Linear The inverter runs the motor with the constant acceleration and
deceleration.
－
1
S-curve
(Fixed) 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.
Fixed:
The acceleration/deceleration rate
to be applied to all of the four
inflection zones is fixed at 5% of
the maximum frequency.
－
2
S-curve
(Adjustable)
Adjustable:
The acceleration/deceleration rate
can be arbitrarily specified for each
of the four inflection zones.
H57
H58
H59
H60
3
Curvilinear 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.
－
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)
<S-curve acceleration/deceleration (fixed): when the frequency change is 10% or more of the maximum
frequency>
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)
<S-curve acceleration/deceleration (adjustable): when the frequency change is 30% or more of the maximum
frequency--10% at the leading edge and 20% at the trailing edge>
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)