TORQUE CHARACTORISTIC

SJ700/SJ700B Series / Torque Under Continous Operation

Sensorless vector control

V/f control

60Hz

 

0.43.7kW

0.411kW

 

 

 

 

 

1522kW

 

 

 

 

 

3055kW

 

 

 

 

 

55132kW

 

=

 

100

 

 

 

95

 

 

3045kW

frequency

 

92

 

 

Outputtorque (%)

80

 

 

 

0.43.7kW

70

 

 

 

55

 

 

 

5.522kW

45

 

 

 

 

 

 

 

35

 

 

 

 

Base

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

 

 

 

 

0.3 6

20

60 65

100

120

Output frequency (Hz)

 

 

 

3055kW

 

Sensorless vector control

50Hz

 

 

 

V/f control

 

 

5.522kW

 

 

0.43.7kW

 

 

 

0.43.7kW

 

 

 

 

 

 

 

100

 

 

55132kW

=

 

 

 

 

95

 

 

 

 

 

90

 

 

 

 

frequency

 

85

 

 

 

 

Output torque (%)

75

 

 

 

3045kW

70

 

 

 

 

65

 

 

 

0.43.7kW

 

 

 

 

55

 

 

 

 

45

 

 

 

5.522kW

36

 

 

 

 

 

 

 

Base

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

 

 

 

 

0.35 16.7

50

65

100

120

Output frequency (Hz)

DERATING DATA

SJ700

 

200V class

 

 

 

 

 

 

SJ700

 

400V class

 

 

 

 

 

 

 

 

 

 

 

 

0.47.5kW

 

 

11kW

 

 

 

 

90kW

37kW

45kW

30kW

0.7511kW

therating:%)

100

 

 

 

 

 

 

 

 

 

therating:%)

100

 

 

 

 

 

 

 

15kW

95

 

 

 

 

 

 

 

 

15kW

95

 

75kW

 

 

 

 

 

85

 

 

 

 

 

 

 

 

18.5kW

85

 

 

 

 

 

 

18.5kW

 

90

 

 

 

 

 

 

 

 

 

90

 

 

 

 

 

 

 

to

80

 

 

 

45,55kW

 

 

 

 

30kW

to

80

 

 

 

 

 

 

 

 

current(Ratio

 

 

 

 

 

 

 

current(Ratio

 

 

 

 

 

110kW

 

 

75

 

 

 

 

 

 

 

 

22kW

75

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

37kW

 

 

 

 

 

 

 

22kW

 

70

 

 

 

 

 

 

 

 

 

 

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output

65

 

 

 

 

 

 

 

 

 

Output

65

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

60

 

 

 

132kW

 

 

 

55kW

 

55

2

4

6

8

10

12

14

15

 

 

55

2

4

6

8

10

12

14

15

 

0.5

 

 

0.5

 

 

 

 

Carrier frequency (kHz)

 

 

 

 

 

 

 

Carrier frequency (kHz)

 

 

SJ700B

400V class

 

 

 

 

 

 

 

 

 

90kW

30kW

45kW

rating:%)

100

 

 

 

 

 

1118.5kW

95

 

 

 

 

 

22kW

90

 

 

 

 

 

 

to the

85

 

132kW

 

 

 

37kW

current(Ratio

80

 

110kW

 

 

55kW

75kW

75

 

 

 

70

 

 

 

 

160kW

 

65

 

 

 

 

 

 

Output

 

 

 

 

 

 

60

 

 

 

 

 

 

 

55

2

4

6

8

10

12

 

0.5

Carrier frequency (kHz)

29

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Image 30
Hitachi manual Derating Data, SJ700/SJ700B Series / Torque Under Continous Operation, Therating%, Rating%

SJ700B, SJ700 specifications

The Hitachi SJ700 and SJ700B series are renowned variable frequency drives (VFDs) that represent a significant advancement in motor control technology. Designed for industrial applications, these drives offer a versatile solution for managing motor speed, torque, and efficiency in a variety of settings.

One of the main features of the SJ700 and SJ700B series is their compact design. This allows for easy installation and integration into existing systems, which is crucial for minimizing downtime during upgrades or replacements. The drives support multiple mounting orientations, facilitating applications with space constraints.

Another standout characteristic is their advanced control algorithms. The SJ700 series uses vector control technology, which optimizes the performance of both AC and induction motors. This ensures high precision in speed and torque control, making it suitable for processes that require fine adjustments. The drives also feature automatic tuning capabilities, which allow for quick commissioning while minimizing the need for extensive parameter adjustments.

The SJ700 and SJ700B series are designed with energy efficiency in mind. They utilize advanced regenerative braking technology that recovers energy, reducing power consumption and improving overall system efficiency. Furthermore, these drives incorporate energy-saving features that optimize motor operation based on load requirements, contributing to a lower carbon footprint.

These drives come equipped with robust communication capabilities. They support various communication protocols such as Modbus, Profibus, and EtherCAT, making them easily integrable with modern automation systems. This flexibility allows for real-time monitoring and control, enhancing operational visibility and efficiency.

Reliability is another hallmark of the SJ700 series. Built with high-quality components, these drives exhibit excellent thermal management and protection against overvoltage, overload, and short circuits. The SJ700B variant boasts additional features such as enhanced fault diagnostics and improved environmental protection, making it suitable for more demanding applications.

In conclusion, the Hitachi SJ700 and SJ700B series variable frequency drives stand out in terms of compact design, advanced control technologies, energy efficiency, versatile communication options, and robust reliability. These features make them an ideal choice for a wide range of industrial applications, from manufacturing automation to HVAC systems, ensuring optimal performance and cost savings for users.