Calculate the speed from the angular position of the rotor (2023)

Calculate the speed from the angular position of the rotor

Starting with R2020a

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library:
Engine Control Block/Sensor Decoder
Engine Control Blockset HDL Support/Sensor Decoder

describe

fromspeed measurementThe block calculates the angular velocity based on the angular position of the rotor by calculating the angular position over time.

example

Field-Oriented Induction Motor Control Using Speed Sensors Field-Oriented Control (FOC) techniques are implemented to control the speed of a three-phase AC induction motor (ACIM). The FOC algorithm requires rotor speed feedback, which in this case is obtained using a quadrature encoder sensor. For more information on FOC, see Field Oriented Control (FOC).

open overview

PMSMI's Field Decay Control (with MTPA) uses Field Oriented Control (FOC) technology to control the torque and speed of a three-phase Permanent Magnet Synchronous Motor (PMSM). The FOC algorithm requires rotor position feedback, which is obtained from quadrature encoder sensors. For more information on FOC, see Field Oriented Control (FOC).

open overview

PMSM Field Oriented Control Using Hall Sensors Implements Field Oriented Control (FOC) techniques for speed control of three-phase permanent magnet synchronous motors (PMSM). The FOC algorithm requires feedback of the rotor position, which is obtained by Hall sensors. For more information on FOC, see Field Oriented Control (FOC).

open overview

Field Oriented Control of PMSMs Using Quadrature Encoders Implement field oriented control (FOC) techniques to control the speed of three-phase permanent magnet synchronous motors (PMSMs). The FOC algorithm requires rotor position feedback, which is obtained from quadrature encoder sensors. For more information on FOC, see Field Oriented Control (FOC).

open overview

luke

import

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and—angular position of the rotor
scalar

Rotor angular position specified in radians, degrees, or units.

type of data:single|double|fixed point

exit

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⍵—Rotor angular velocity
scalar

The angular velocity that the block calculates from the entered angular position.

type of data:single|double|fixed point

parameter

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job unit—angular position unit
`Radial`(default) |`frequency`|`per unit`

angular position unitand。

Position scaling data type—Enter location map range
`uint32`(default) |`uint16`|`uint64`

Used to internally map input locations to match ranges for unsigned data types. For example, the block scales the input within a certain range（0 - 2p）unhappy(0 - (2³²-1))For data type uint32.

speed calculation standard—speed calculation method
`Maximum Application Speed`(default) |`speed resolution`|`Time interval for speed calculation`

Velocity calculation method used in the block. The selected method determines the range of rotor speeds that the module can measure.

The values of these parameters are based onspeed calculation standardscope:

parameter name	Maximum Application Speed	speed resolution	Time interval for speed calculation
Rate calculation latency (number of samples)	`299`	`28`	`28`
Maximum Measurable Speed (RPM)	`1000`	`10344.8276`	`10713.2857`
Measurable Velocity Resolution (RPM)	`4.6566e-07`	`4.9892e-06`	`4.9892e-06`

discrete stack size—Sample time before the block is executed again
`100e-6`(default) | scalar

The fixed time interval, in seconds, between any two consecutive instances of block execution.

The values of these parameters are based ondiscrete stack sizeParameter value:

Rate calculation latency (number of samples)
Maximum Measurable Speed (RPM)
Measurable Velocity Resolution (RPM)

Maximum Application Speed (RPM)—Maximum measurable rotor speed
`1000`(default) | scalar

The maximum rotor speed (in revolutions per minute) that this block can measure.

The values of these parameters are based onMaximum Application Speed (RPM)Parameter value:

Rate calculation latency (number of samples)
Maximum Measurable Speed (RPM)
Measurable Velocity Resolution (RPM)

addiction

To enable this parameter, set thespeed calculation standardunhappyMaximum Application Speed。

Speed Resolution (RPM)—Minimum detectable speed
`5e-6`(default) | scalar

minimum value of changeandInput per unit of time that the module can detect.

The values of these parameters are based onSpeed Resolution (RPM)Parameter value:

Rate calculation latency (number of samples)
Maximum Measurable Speed (RPM)
Measurable Velocity Resolution (RPM)

addiction

To enable this parameter, set thespeed calculation standardunhappyspeed resolution。

Rate calculation latency (number of samples)—Measured Angular Position Sample Number
`299`from`28`(default) | scalar

The number of angular position input samples that the module measures to calculate the average position value.

The values of these parameters are based onRate calculation latency (number of samples)Parameter value:

Maximum Measurable Speed (RPM)
Measurable Velocity Resolution (RPM)

addiction

To enable this parameter, set thespeed calculation standardunhappyTime interval for speed calculation。

Maximum Measurable Speed (RPM)—measurable speed
`1000`from`10344.8276`from`10713.2857`(default) | scalar

The absolute highest speed the block can measure.

This parameter is not configurable and uses a value calculated internally using other parameters.

Measurable Velocity Resolution (RPM)—The minimum velocity resolution used to calculate velocity
`4.6566e-07`from`4.9892e-06`(default) | scalar

The minimum velocity resolution that the block uses to calculate velocity. it is always less than or equal toSpeed Resolution (RPM)。

This parameter is not configurable and uses a value calculated internally using other parameters.

speed unit—output angular velocity unit
`revolutions per minute`(default) |`degree/second`|`Radial/sec`|`Each unit is based on the highest measurable speed`|`dialogue based per unit`

The unit of the output angular velocity.

per speed unit (RPM)—Calculated speed per unit (in RPM)
`1000`(standard)

Specifies the speed calculated per unit in RPM.

addiction

This parameter only appears in the following casesdialogue based per unitSelectedspeed unit。

Velocity data type—Angular velocity output data type
`single`(default) |`double`|`fixed point`

Angular velocity output data type⍵。

Comment

fromspeed measurementThe block may occasionally display a warning message' wrap when overflow is detected。'

wide range of possibilities

C/C++ code generation
Generate C and C++ code with Simulink® Coder™.

HDL code generation
Generate Verilog and VHDL code for FPGA and ASIC designs with HDL Coder™.

HDL Coder™ provides additional configuration options that affect HDL implementation and synthesis logic.

HDL Architecture

The block has a standard HDL schema.

HDL block properties


limited output pipeline	The number of registers placed on the output by moving existing delays in the design. The distributed pipeline does not reallocate these registers. The default value is`0`. For more details, seelimited output pipeline(HDL coder)。
Inlet pipe	The number of input pipeline stages to insert into the generated code. Distributed pipelines and limited-output pipelines can move these registers. The default value is`0`. For more details, seeInlet pipe(HDL coder)。
export pipeline	The number of pipeline output stages to insert into the generated code. Distributed pipelines and limited-output pipelines can move these registers. The default value is`0`. For more details, seeexport pipeline(HDL coder)。

fixed-point conversion
Design and simulate fixed-point systems with Fixed-Point Designer™.

version history

Introduced in R2020a

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Calculate the speed from the angular position of the rotor (2023)

describe

example

luke

import

and—angular position of the rotor
scalar

exit

⍵—Rotor angular velocity
scalar

parameter

job unit—angular position unit
`Radial`(default) |`frequency`|`per unit`

Position scaling data type—Enter location map range
`uint32`(default) |`uint16`|`uint64`

speed calculation standard—speed calculation method
`Maximum Application Speed`(default) |`speed resolution`|`Time interval for speed calculation`

discrete stack size—Sample time before the block is executed again
`100e-6`(default) | scalar

Maximum Application Speed (RPM)—Maximum measurable rotor speed
`1000`(default) | scalar

addiction

Speed Resolution (RPM)—Minimum detectable speed
`5e-6`(default) | scalar

addiction

Rate calculation latency (number of samples)—Measured Angular Position Sample Number
`299`from`28`(default) | scalar

addiction

Maximum Measurable Speed (RPM)—measurable speed
`1000`from`10344.8276`from`10713.2857`(default) | scalar

Measurable Velocity Resolution (RPM)—The minimum velocity resolution used to calculate velocity
`4.6566e-07`from`4.9892e-06`(default) | scalar

speed unit—output angular velocity unit
`revolutions per minute`(default) |`degree/second`|`Radial/sec`|`Each unit is based on the highest measurable speed`|`dialogue based per unit`

per speed unit (RPM)—Calculated speed per unit (in RPM)
`1000`(standard)

addiction

Velocity data type—Angular velocity output data type
`single`(default) |`double`|`fixed point`

wide range of possibilities

C/C++ code generation
Generate C and C++ code with Simulink® Coder™.

HDL code generation
Generate Verilog and VHDL code for FPGA and ASIC designs with HDL Coder™.

fixed-point conversion
Design and simulate fixed-point systems with Fixed-Point Designer™.

version history

see also

theme

MATLAB commands

USA

Europa

Asia-Pacific

References

Calculate the speed from the angular position of the rotor (2023)

describe

example

luke

import

and—angular position of the rotorscalar

exit

⍵—Rotor angular velocityscalar

parameter

job unit—angular position unit Radial(default) |frequency|per unit

Position scaling data type—Enter location map range uint32(default) |uint16|uint64

speed calculation standard—speed calculation method Maximum Application Speed(default) |speed resolution|Time interval for speed calculation

discrete stack size—Sample time before the block is executed again 100e-6(default) | scalar

Maximum Application Speed ​​(RPM)—Maximum measurable rotor speed 1000(default) | scalar

addiction

Speed ​​Resolution (RPM)—Minimum detectable speed 5e-6(default) | scalar

addiction

Rate calculation latency (number of samples)—Measured Angular Position Sample Number 299from28(default) | scalar

addiction

Maximum Measurable Speed ​​(RPM)—measurable speed 1000from10344.8276from10713.2857(default) | scalar

Measurable Velocity Resolution (RPM)—The minimum velocity resolution used to calculate velocity 4.6566e-07from4.9892e-06(default) | scalar

speed unit—output angular velocity unit revolutions per minute(default) |degree/second|Radial/sec|Each unit is based on the highest measurable speed|dialogue based per unit

per speed unit (RPM)—Calculated speed per unit (in RPM) 1000(standard)

addiction

Velocity data type—Angular velocity output data type single(default) |double|fixed point

wide range of possibilities

C/C++ code generation Generate C and C++ code with Simulink® Coder™.

HDL code generationGenerate Verilog and VHDL code for FPGA and ASIC designs with HDL Coder™.

fixed-point conversion Design and simulate fixed-point systems with Fixed-Point Designer™.

version history

see also

theme

MATLAB commands

USA

Europa

Asia-Pacific

References

and—angular position of the rotor
scalar

⍵—Rotor angular velocity
scalar

job unit—angular position unit
`Radial`(default) |`frequency`|`per unit`

Position scaling data type—Enter location map range
`uint32`(default) |`uint16`|`uint64`

speed calculation standard—speed calculation method
`Maximum Application Speed`(default) |`speed resolution`|`Time interval for speed calculation`

discrete stack size—Sample time before the block is executed again
`100e-6`(default) | scalar

Maximum Application Speed (RPM)—Maximum measurable rotor speed
`1000`(default) | scalar

Speed Resolution (RPM)—Minimum detectable speed
`5e-6`(default) | scalar

Rate calculation latency (number of samples)—Measured Angular Position Sample Number
`299`from`28`(default) | scalar

Maximum Measurable Speed (RPM)—measurable speed
`1000`from`10344.8276`from`10713.2857`(default) | scalar

Measurable Velocity Resolution (RPM)—The minimum velocity resolution used to calculate velocity
`4.6566e-07`from`4.9892e-06`(default) | scalar

speed unit—output angular velocity unit
`revolutions per minute`(default) |`degree/second`|`Radial/sec`|`Each unit is based on the highest measurable speed`|`dialogue based per unit`

per speed unit (RPM)—Calculated speed per unit (in RPM)
`1000`(standard)

Velocity data type—Angular velocity output data type
`single`(default) |`double`|`fixed point`

C/C++ code generation
Generate C and C++ code with Simulink® Coder™.

HDL code generation
Generate Verilog and VHDL code for FPGA and ASIC designs with HDL Coder™.

fixed-point conversion
Design and simulate fixed-point systems with Fixed-Point Designer™.