Medical Design Briefs - November 2022 - 22

Innovative Motors
PCB for the electronic
commutation
Coil
Balanced magnet
Fig. 4 - A laboratory automation machine.
Fig. 5 - Brushless DC motor components.
Cylindrical Motor
Flat Motor
* Long life. Automated equipment usually
works continuously for many years.
* Reliability. Because failures or maintenance
issues delay diagnostics as well as
patient treatment, motor reliability is
paramount.
* High speed. Fast motors increase productivity
and, thus, the number of diagnostics
per day.
* Precise positioning. Motors control the
amount of reagent being placed into
the samples. Miniature electric motors
provide consistent motion to ensure accurate,
repeatable results.
Fig. 6 - Interior view of a cylindrical motor (left) and a flat motor (right).
22
Because some applications have multiple
automated axes, designers must choose
from a variety of motion technologies, including
stepper motors and BLDC motors.
Stepper motors. These motors have an
electronic commutation, so there is no
mechanical wear. Accordingly, they have a
long lifespan and are ideal for lab automation
machines. Stepper motors have several
magnetized poles, so the current commutates
many times during one rotation
for stable positions and high torque performance.
They are easily driven and deliver
high precision without an encoder,
making them well suited for applications
where positioning is important.
One of the trade-offs with steppers is
speed. A high-frequency commutation is
needed to work quickly. Due to the inductance
effect of the coil, the current needs
some time to rise. If the commutation frequency
is too high, the current does not
have enough time to rise. Therefore, stepper
motors are limited in speed and are
typically suitable for output speeds below
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Medical Design Briefs, November 2022
Motor
Coil

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Medical Design Briefs - November 2022

Table of Contents for the Digital Edition of Medical Design Briefs - November 2022

Medical Design Briefs - November 2022 - COV1a
Medical Design Briefs - November 2022 - COV1b
Medical Design Briefs - November 2022 - CovI
Medical Design Briefs - November 2022 - CovII
Medical Design Briefs - November 2022 - 1
Medical Design Briefs - November 2022 - 2
Medical Design Briefs - November 2022 - 3
Medical Design Briefs - November 2022 - 4
Medical Design Briefs - November 2022 - 5
Medical Design Briefs - November 2022 - 6
Medical Design Briefs - November 2022 - 7
Medical Design Briefs - November 2022 - 8
Medical Design Briefs - November 2022 - 9
Medical Design Briefs - November 2022 - 10
Medical Design Briefs - November 2022 - 11
Medical Design Briefs - November 2022 - 12
Medical Design Briefs - November 2022 - 13
Medical Design Briefs - November 2022 - 14
Medical Design Briefs - November 2022 - 15
Medical Design Briefs - November 2022 - 16
Medical Design Briefs - November 2022 - 17
Medical Design Briefs - November 2022 - 18
Medical Design Briefs - November 2022 - 19
Medical Design Briefs - November 2022 - 20
Medical Design Briefs - November 2022 - 21
Medical Design Briefs - November 2022 - 22
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Medical Design Briefs - November 2022 - 26
Medical Design Briefs - November 2022 - 27
Medical Design Briefs - November 2022 - 28
Medical Design Briefs - November 2022 - 29
Medical Design Briefs - November 2022 - 30
Medical Design Briefs - November 2022 - 31
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Medical Design Briefs - November 2022 - 33
Medical Design Briefs - November 2022 - 34
Medical Design Briefs - November 2022 - 35
Medical Design Briefs - November 2022 - 36
Medical Design Briefs - November 2022 - 37
Medical Design Briefs - November 2022 - 38
Medical Design Briefs - November 2022 - 39
Medical Design Briefs - November 2022 - 40
Medical Design Briefs - November 2022 - 41
Medical Design Briefs - November 2022 - 42
Medical Design Briefs - November 2022 - CovIII
Medical Design Briefs - November 2022 - CovIV
https://www.nxtbook.com/smg/techbriefs/24MDB04
https://www.nxtbook.com/smg/techbriefs/24MDB03
https://www.nxtbook.com/smg/techbriefs/24MDB02
https://www.nxtbook.com/smg/techbriefs/24MDB01
https://www.nxtbook.com/smg/techbriefs/23MDB12
https://www.nxtbook.com/smg/techbriefs/23MDB11
https://www.nxtbook.com/smg/techbriefs/23MDB10
https://www.nxtbook.com/smg/techbriefs/23MDB09
https://www.nxtbook.com/smg/techbriefs/23MDB08
https://www.nxtbook.com/smg/techbriefs/23MDB07
https://www.nxtbook.com/smg/techbriefs/23MDB06
https://www.nxtbook.com/smg/techbriefs/23MDB05
https://www.nxtbook.com/smg/techbriefs/23MDB04
https://www.nxtbook.com/smg/techbriefs/23MDB03
https://www.nxtbook.com/smg/techbriefs/23MDB02
https://www.nxtbook.com/smg/techbriefs/23MDB01
https://www.nxtbook.com/smg/techbriefs/techleaders22
https://www.nxtbook.com/smg/techbriefs/22MDB12
https://www.nxtbook.com/smg/techbriefs/22MDB11
https://www.nxtbook.com/smg/techbriefs/22MDB10
https://www.nxtbook.com/smg/techbriefs/22MDB09
https://www.nxtbook.com/smg/techbriefs/22MDB08
https://www.nxtbook.com/smg/techbriefs/22MDB07
https://www.nxtbook.com/smg/techbriefs/22MDB06
https://www.nxtbook.com/smg/techbriefs/22MDB04
https://www.nxtbook.com/smg/techbriefs/techleaders21
https://www.nxtbook.com/smg/techbriefs/22MDB03
https://www.nxtbook.com/smg/techbriefs/22MDB02
https://www.nxtbook.com/smg/techbriefs/22MDB01
https://www.nxtbook.com/smg/techbriefs/21MDB12
https://www.nxtbook.com/smg/techbriefs/21MDB11
https://www.nxtbook.com/smg/techbriefs/21MDB10
https://www.nxtbook.com/smg/techbriefs/21MDB09
https://www.nxtbook.com/smg/techbriefs/21MDB08
https://www.nxtbook.com/smg/techbriefs/21MDB07
https://www.nxtbook.com/smg/techbriefs/21MDB06
https://www.nxtbook.com/smg/techbriefs/21MDB05
https://www.nxtbook.com/smg/techbriefs/21MDB04
https://www.nxtbook.com/smg/techbriefs/21MDB02
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