IPS2200 Datasheet

Jan.19.21

Page 20

10. Operating at High Speed

The IPS2200 uses analog signal processing, so it can handle inputs signals at very high speed. The input signal

can have a frequency of up to 4.16kHz, which is equivalent to 250000 RPM (electrical phases per minute). Even

higher frequencies and therefore higher speeds are possible, but with reduced performance and signal

amplitude.

The mechanical rotor speed can be calculated with Equation 10:

rpm(mech)⁡=⁡

rpm (el)

coil periods

Equation 10

Where

rpm (mech) Rotation speed of the rotor (and target) in revolutions per minute.

rpm (el)

Maximum electrical input frequency of the sensor in rpm (electrical)

= 250000 electrical periods per minute (rpm)

= 4166 electrical periods per second = 4.166kHz

coil periods Number of electrical periods per turn

= number of coil periods per 360° circle

= number of metal target segments

Figure 23 shows a design for a 6 pole motor (having 3 pole pairs) using a 3-periodic coil design.

The maximum mechanical rotation speed of this motor is calculated according to Equation 11.

250000 rpm

3

⁡=⁡83333 rpm

Equation 11

Table 18. Output Modes and Maximum Speed

SIN/COS Output Mode

AB Output Mode

Maximum Rotor Speed

Target Design

(metal/no metal)

Sine, Cosine Cycles

per Revolution

Quadrature Pulses per

Revolution

Quadrature Counts

per Revolution

Mechanical

Speed

1

 (180° / 180°)

1

 360°

1

4

250000 rpm

2

 (90° / 90°)

2

 180°

2

8

125000 rpm

3

 (60° / 60°)

3

 120°

3

12

83333 rpm

4

 (45° / 45°)

4

 90°

4

16

62500 rpm

6

 (30° / 30°)

6

 60°

6

24

41666 rpm

8

 (22.5° / 22.5°)

8

 45°

8

32

31250 rpm

10

 (18° / 18°)

10

 36°

10

40

25000 rpm

…

1 cycle per target

1 pulse per target

4

 counts per target

250000 RPM / targets per wheel